Top PDF A Study of the Reactions ⁹Be(p,α) and ⁹Be(p,d) at Low Energies

A Study of the Reactions ⁹Be(p,α) and ⁹Be(p,d) at Low Energies

A Study of the Reactions ⁹Be(p,α) and ⁹Be(p,d) at Low Energies

Normalization of Detector Solid Angle and Target Thickness The total uncertainty in converting counting rates to absolute cross sections by means of the Rutherford scattering measurement[r]

78 Read more

Study of e+e− annihilation to hadrons at low energies at BABAR

Study of e+e− annihilation to hadrons at low energies at BABAR

During the last decade the BABAR experiment [1, 2] at the SLAC National Accelerator Laboratory performs the intensive study of exclusive processes of e + e − annihila- tion into hadrons at low energies using the initial-state ra- diation (ISR) technique. The main goal of this study is to measure exclusive cross sections for all possible final hadronic states below 2 GeV and calculate the total cross section, which used in Standard Model (SM) calculations of the muon anomalous magnetic moment a μ = (g μ − 2)/2

6 Read more

Can a Linear Sigma Model Describe Walking Gauge Theories at Low Energies?

Can a Linear Sigma Model Describe Walking Gauge Theories at Low Energies?

In recent years, there has been a renewed interest in the capacity of strongly coupled Yang-Mills gauge theories to admit low energy physics that is markedly di ff erent from the low energy behavior of Quantum Chromodynamics (QCD). The novel physics seems to appear concurrently with the theory becoming nearly scale invariant in the IR in a region of parameter space known as the conformal window. Currently, the primary tool to study theories near and inside the conformal window is lattice Monte Carlo calculation. However, in a scale invariant system correlations quickly grow to be as large as the box size and finite volume effects become problematic. A new lattice methodology capable of
Show more

8 Read more

Effect of projectile on incomplete fusion reactions at low energies

Effect of projectile on incomplete fusion reactions at low energies

The study of breakup of heavy ions followed by the fu- sion of one of the fragments with the target has gained a resurgent interest. Several authors reported the competi- tion of complete fusion (CF) and incomplete fusion (ICF) reactions at energies slightly above the Coulomb barrier [1–10], and a substantial ICF fraction has been observed at these energies. In general, the complete fusion (CF) process is considered to be the sole contributor to the to- tal fusion cross section at low energies i.e. starting from threshold to 7 MeV / A.

6 Read more

Study of soil aggregate breakdown dynamics under low dispersive ultrasonic energies with sedimentation and X-ray attenuation

Study of soil aggregate breakdown dynamics under low dispersive ultrasonic energies with sedimentation and X-ray attenuation

chances of damaging particles or organic matter fractions can be expected to be rather small. Also, our implemented pro- cedure might reduce cavitation-caused chemical reactions which bear the potential to change chemical characte- ristics of organic compounds ie to alter the ratio between water dissolved hydrophobic and hydrophilic organic compounds (Kaiser and Asefaw Berhe, 2014). This has important bearings on the study of soil organic matter binding. Low ultrasonic energies are required to study the stability and breakdown dynamics of soil aggregates and the associated release of soil organic matter.
Show more

8 Read more

Reaction production + AMS: An alternative method to study low energy reactions. 26Al as a test case

Reaction production + AMS: An alternative method to study low energy reactions. 26Al as a test case

During the last 20 years, most of the interest resonances have been well measured. However, there still remains some discrepancies for specific values as, for instance, 197 keV, 417 keV and 435 keV resonance energies. Considering our present systems, we are able to obtain the strength of resonances around 400 keV, by using a similar methodology that was used in [1, 11].

6 Read more

Studying astrophysical reactions with low-energy RI beams at CRIB

Studying astrophysical reactions with low-energy RI beams at CRIB

supernovae. There have also been measurements based on other ex- perimental methods. The first THM measurement using an RI beam has been performed at CRIB, to study the 18 F( p , α ) 15 O reaction at astrophysical energies via the three body reaction 2 H( 18 F, α 15 O) n . The 18 F( p , α ) 15 O reaction rate is crucial to understand the 511-keV γ -ray production in nova explosion phenomena, and we successfully evaluated the reaction cross section at novae temperature and below experimentally for the first time.

8 Read more

Renewable Energies Which Converts Low-Voltage Degree To High-Voltage Level Strength

Renewable Energies Which Converts Low-Voltage Degree To High-Voltage Level Strength

transformer equalizers and equalization chargers the usage of voltage multipliers was proposed. In this paper, we suggest, a double-transfer equalizer using a parallel-resonant inverter [r]

8 Read more

Renewable Energies Which Converts Low-Voltage Degree to High-Voltage Level Strength

Renewable Energies Which Converts Low-Voltage Degree to High-Voltage Level Strength

In this paper we proposed a double-switch mobile voltage equalizer, to assemble the proposed equalizer; we need an aggregate of PRI/SPRI and a voltage multiplier. On this the double-switch shape doesn’t have the multi-winding transformer, which gives simplified circuit, so the equalizer can perform well at even, SC voltage is 0 V. Due to the natural houses of PRI/SPRI’s receives rid of the need or remarks manipulate to restriction currents under sure stages at a difficult and fast frequency. Dc circuits of voltage multiplier and PRI/SPRI were derived by way of the usage of combining the identical circuits from the discrete mathematic assessment. 10W hardware circuit of the proposed equalizer for 12 cells linked in series changed into made for experiments, which might be performed in initially imbalanced voltage conditions of collection-linked EDLCs. At the give up of the experiments, it was set up the equalization overall performance of the equalizer, voltage imbalance changed into step by step decreased, and in the end significant deviations of cellular voltages decreases low sufficient
Show more

7 Read more

energies ISSN

energies ISSN

Due to the low estimation of coal mining capacity and promotion of clean coal technologies, the Chinese Academy of Engineering projects a relatively smaller total primary energy demand in 2030, compared with most of the scenario results of WEO 2010 [7] and IEO 2010 [8]. Meanwhile, the projected percentage of coal demand to total energy demand by CAE is higher than that in other scenarios, indicating that in CAE’s consideration, coal will continue to play a dominant role in China’s energy supply and demand system for a long term.

22 Read more

energies ISSN

energies ISSN

Of course most of our energy costs less than oil so that the 70 dollars a barrel we used in the example above translates to – in the real economy -- the equivalent of about $35 a barrel[r]

23 Read more

Registration and Energies

Registration and Energies

For the second printing, place the print face up on the felts and use the marks of the plate edge on the length and width of the paper as a guide in placing the newly inked plate over th[r]

29 Read more

Study of multipion production in np-interaction at intermediate energies

Study of multipion production in np-interaction at intermediate energies

Abstract. The reactions of the multipion production in np-interactions were studied at the momenta of incident neutrons from 1.73 to 5.20 GeV/c. The pions multiplicity of the studied reactions was from 2 to 6. It was shown that the characteristics of the reactions were satisfactory described within the framework of OPER-model (One Pion Reggeizied Exchange). Additionally the diagrams of one baryon exchange (OBE) were used for a better description of the data at the momenta of incident neutrons below 3 GeV / c.

8 Read more

A study of photoproton reactions in heavy nuclei

A study of photoproton reactions in heavy nuclei

possible to investigate the systematics of nuclear photodisin­ tegrations. The problem of accurately determining photonuclear cross sections is complicated by the use of bremsstrahlung radiation which makes the data much more difficult to interpret than the data obtained using monochromatic gamma rays. However, recent improvements in the energy stability of electron acceler­ ators, now reported as low as 5 keV (G o 54), together with better knowledge of the bremsstrahlung spectrum, have made it possible to measure photonuclear cross sections with greater accuracy.
Show more

175 Read more

Fusion-fission studies on 19F+206,208Pb and 11B,19F+238U reactions around barrier energies at IUAC facility

Fusion-fission studies on 19F+206,208Pb and 11B,19F+238U reactions around barrier energies at IUAC facility

shown in Fig. 5a-d. These energies correspond to below and above the barrier in respective cases. At all energies, the measured mass spectra from both reactions could be described by a single symmetric Gaussian centered around mass ratio 0.5. As the excitation energy in fissioning nu- clei increases, the mass width increase as a function of temperature as expected. There is no significant deviation from symmetric Gaussian shape at any of the measured energy point which signify fully mass equilibrated fusion- fission dominating in both reactions.

6 Read more

Smooth transition from sudden to adiabatic states in heavy-ion fusion reactions at deep-subbarrier incident energies

Smooth transition from sudden to adiabatic states in heavy-ion fusion reactions at deep-subbarrier incident energies

In the figure, we can clearly see that the calculated po- tential energies at the touching point follow the systematic curve proposed by Jiang et al., indicating that the dynam- ics after the touching point is responsible for the steep fall- o ff phenomenon. We emphasize that our analysis is inde- pendent of the adiabatic or the sudden approaches because both provide a similar potential energy to each other as long as the touching point is concerned.

6 Read more

DEFECT ENERGIES IN ZNSE

DEFECT ENERGIES IN ZNSE

We have now quite a range of results to allow us to assess an ionic model for ZnSe. Centres where the Schrodinger equation must be solved for a trapped carrier are an obvious [r]

11 Read more

Study of Integrated Renewable Energies for Developing Countries – Scope and Challenges

Study of Integrated Renewable Energies for Developing Countries – Scope and Challenges

This paper focused on the integrated renewable energies for developing countries and also highlights on its scopes and challenging in developing countries such as India. A worldwide research and development in the field of renewable energy sources (RES) and systems is carried out during the last two decades. At the end of 2001 the total installed capacity of renewable energy systems was equivalent to 9% of the total electricity generation. By applying a renewable energy intensive scenario the global consumption of renewable sources by 2050 would reach 318 exajoules (1exajoule=10 18 J) .Renewable energy projects in many developing countries have demonstrated that renewable energy can directly contribute to poverty alleviation by providing the energy needed for creating businesses and employment. Renewable energy technologies can also make indirect contributions to alleviating poverty by providing energy for cooking, space heating, and lighting. Renewable energy can also contribute to education, by providing electricity to schools.
Show more

5 Read more

A Study of Low Dose Subcutaneous Adrenaline to Prevent Acute Adverse Reactions to Antivenom Serum in people bitten by Snakes

A Study of Low Dose Subcutaneous Adrenaline to Prevent Acute Adverse Reactions to Antivenom Serum in people bitten by Snakes

Patients were excluded from the study if they were pregnant, aged under 12 or over 70 years, said they had received antisera, including antivenom serum, in the past; had known adverse reactions to adrenaline, atopy, wheezing, hypertension, ischaemic heart disease, transient ischaemic attacks, strokes or unexplained focal neurological signs or had received any treatment other than first aid before admission. Patients were also excluded if electrocardiography on admission showed ischaemic changes or arrhythmias. Written informed consent was obtained from all participating patients.
Show more

94 Read more

A study of enzyme catalysis of cycloaddition reactions

A study of enzyme catalysis of cycloaddition reactions

equimolar amount of sodium azide to give the monoazide 75. The monoazide 75 was isolated by column chromatography in a 37% yield, which is low due to the further reaction of the monoazide 75 with sodium azide to give the corresponding diazide. The ESI(+ve) mass spectrum of the azide 75 presented a peak at m/z 292 corresponding to the sodiated molecular ion. The ‘H NMR spectrum displayed doublet resonances at 7.79 ppm and 7.34 ppm for the p-toluenesulfonyl group and resonances at 4.04 ppm, 3.26 ppm, 1.74 ppm and 1.61 ppm for the methylene protons. Additionally, the IR spectrum displayed a strong absorbance at 2099 cm 1 attributable to the asymmetric stretch of the azido group. The direct alkylation of adenine with the azide 75 was accomplished by mixing adenine, the azide 75 and caesium carbonate in A,A-dimethylformamide to give the azide 46 in a 42% yield. The successful outcome of the reaction was confirmed by the presence of a peak at m/z 233 in the ESI(+ve) mass spectrum of the product corresponding to the protonated molecular ion of the azide 46. The 'H NMR spectrum displayed singlet resonances at 8.34 ppm and 7.81 ppm of the protons on the adenine group. The alkylation reaction was expected to be regioselective and the fact that a signal for the proton attached to the A^-position of adenine was not observed in the ‘H NMR spectrum of the azide 46 indicates coupling had occurred at this position. A broad singlet for the protons of the amino group at 6.41 ppm was also observed indicating that coupling had not occurred at the amino group. Furthermore, the IR spectrum displayed a strong absorbance at 2098 cm"1 for the azido group.
Show more

220 Read more

Show all 10000 documents...