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The Quasiparticle Random Phase Approximation (QRPA) is used in evaluation of the total muon capture ratesfor the final nuclei participating in double-beta decay. Several variants of the method are used, depending on the size of the single…

Nuclear Theory · Physics 2020-09-09 Fedor Simkovic , Rastislav Dvornicky , Petr Vogel

High temperature radiating Air is produced experimentally by focusing a shock wave with the help of a spherically converging test section attached to a shock tube. The converging section concentrates the shock to a point with minimum…

Fluid Dynamics · Physics 2022-07-25 Saranyamol V. S. , Mohammed Ibrahim S

Experimental analyses of moderate temperature nuclear gases produced in the violent collisions of 35 MeV/nucleon$^{64}$Zn projectiles with $^{92}$Mo and $^{197}$Au target nuclei reveal a large degree of alpha particle clustering at low…

The fission probability of 232Pa was measured as a function of the excitation energy in order to search for hyperdeformed (HD) transmission resonances using the (d,pf) transfer reaction on a radioactive 231Pa target. The experiment was…

Incoherent photon emission by ultrarelativistic electrons in the normal incidence of a laser pulse on a foil is investigated by means of three-dimensional numerical simulations in the range of intensities $2 \times 10^{21} \text{--} 2…

Plasma Physics · Physics 2014-02-03 E. N. Nerush , I. Yu. Kostyukov , L. Ji , A. Pukhov

Hamamatsu photomultiplier tubes (PMT) and various PMT window materials were exposed to gamma irradiation. Tests were performed with absorbed doses of 1 krad and 120 krad. Initial recommendations on PMT types to use in the BTeV…

Instrumentation and Detectors · Physics 2007-05-23 A. Borisevich , V. Dormenev , G. Drobychev , A. Fyodorov , M. Korzhik , Y. Kubota , A. Lobko , A. Lopatik , O. Missevitch , V. Moroz

In 2006 Mom\v{c}ilovi\'c et al. measured radioactvity levels of 210Po and 210Bi by alpha- and beta-measurements resp. to determine the natural distribuion of environmental radon daughters in the different brain areas of an Alzheimer Disease…

Medical Physics · Physics 2018-06-26 Michael S. Pravikoff , Christine Marquet , Philippe Hubert

A new general expression is derived for nuclear electron capture rates within dense plasmas. Its qualitative nature leads us to question some widely accepted assumptions about how to calculate the effects of the plasma on the rates. A…

Solar and Stellar Astrophysics · Physics 2011-07-04 R. F. Sawyer

We present a general solution for the radiation intensity in front of a purely absorbing slab moving toward an observer at constant speed and with a constant temperature. The solution is obtained by integrating the lab-frame radiation…

Computational Engineering, Finance, and Science · Computer Science 2020-09-07 Ryan G. McClarren , N. A. Gentile

Characteristics of ion acceleration in the internal magnetic reconnection events (IRE) have been studied by means of a neutral particle energy analyzer (NPA) in Tokyo Spherical Tokamak (TST-2). The major and minor radii are 0.38 m and…

This work presents time-dependent numerical calculations of heat generation and dissipation in targets used in high ion-beam current nuclear astrophysics experiments. The simulation is beneficial for choosing the thickness of targets,…

Instrumentation and Detectors · Physics 2020-02-25 Tanmoy Bar , Chinmay Basu , Mithun Das , Apurba Kumar Santra , Swarnendu Sen

A method to extract primary $\gamma$-ray spectra from particle-$\gamma$ coincidences at excitation energies up to the neutron binding energy is described. From these spectra, the level density and $\gamma$-ray strength function can be…

Nuclear Experiment · Physics 2007-05-23 M. Guttormsen , M. Hjorth-Jensen , J. Rekstad , S. Siem , A. Schiller , A. Voinov

Reliable photo-nuclear reaction rates at the stellar conditions are essential to understand the origin of the heavy stable neutron-deficient isotopes between $^{74}$Se and $^{196}$Hg-p-nuclei, however, many reaction rates of relevance still…

The HANARO ex-core neutron irradiation facility was developed for various applications in the boron neutron capture therapy (BNCT) field, and its characteristics have been investigated. In order to obtain a sufficient thermal neutron flux…

Medical Physics · Physics 2015-06-26 Myong-Seop Kim , Byung-Chul Lee , Sung-Yul Hwang , Heonil Kim , Byung-Jin Jun

The Pixel Detector (PXD) of the Belle II experiment at superKEKB accelerator in Japan is based in the DEPFET technology. Two layers of 8+12 modules at a radius of 13 and 22 mm will give a spatial resolution below 10 mm. The radiation level…

Instrumentation and Detectors · Physics 2011-11-21 Pablo Vázquez Regueiro , Eliseo Pérez Trigo , Pablo Rodríguez Pérez

It is often stated that gamma-ray bursts (GRBs) have typical energies of several hundreds $\keV$, where the typical energy may be characterized by the hardness H, the photon energy corresponding to the peak of $\nu F_{\nu}$. Among the 54…

Astrophysics · Physics 2009-10-30 Ehud Cohen , Tsvi Piran , Ramesh Narayan

We test the Coulomb exchange and correlation energy density functionals of electron systems for atomic nuclei in the local density approximation (LDA) and the generalized gradient approximation (GGA). For the exchange Coulomb energies, it…

Nuclear Theory · Physics 2018-04-25 Tomoya Naito , Ryosuke Akashi , Haozhao Liang

The $\gamma$-ray strength function, or average reduced $\gamma$-ray transition probability, is a fundamental input in the calculation of $(n,\gamma)$ cross sections used to simulate the nucleosynthesis of elements heavier than Fe. Since…

Nuclear Experiment · Physics 2019-04-11 L. Crespo Campo , R. B. Firestone , B. A. Brown , M. Guttormsen , R. Schwengner

Monte Carlo simulations have been performed in order to evaluate the efficiencies of several light ions identification techniques. The detection system was composed with layers of scintillating material to measure either the deposited…

Nuclear Experiment · Physics 2013-10-02 S. Salvador , M. Labalme , J. M. Fontbonne , J. Dudouet , J. Colin , D. Cussol