scholarly journals Beta-decay and electron capture rates of hot nuclei in stellar matter

2019 ◽  
Author(s):  
Semyon V. Sidorov ◽  
Alan A. Dzhioev ◽  
Tatyana Yu. Tretyakova
Keyword(s):  
Electron Capture ◽  
Beta Decay ◽  
Stellar Matter ◽  
Hot Nuclei ◽  
Capture Rates

Gamow-Teller transitions to Zr93 via the Nb93(t,He3+γ ) reaction at 115 MeV/u and its application to the stellar electron-capture rates

2020 ◽  
Vol 101 (1) ◽  
Author(s):  
B. Gao ◽  
R. G. T. Zegers ◽  
J. C. Zamora ◽  
D. Bazin ◽  
B. A. Brown ◽  
...  
Keyword(s):  
Electron Capture ◽  
Gamow Teller ◽  
Capture Rates

scholarly journals Electron and positron capture rates on 55Co in stellar matter

2007 ◽  
Vol 37 (4) ◽  
Author(s):  
Jameel-Un Nabi ◽  
Muneeb-Ur Rahman ◽  
Muhammad Sajjad
Keyword(s):  
Stellar Matter ◽  
Positron Capture ◽  
Capture Rates

scholarly journals Screening Corrections to the Electron Capture Rates in Dense Stars by the Relativistically Degenerate Electron Liquid

2002 ◽  
Vol 579 (1) ◽  
pp. 380-385 ◽  
Author(s):  
Naoki Itoh ◽  
Nami Tomizawa ◽  
Masaya Tamamura ◽  
Shinya Wanajo ◽  
Satoshi Nozawa
Keyword(s):  
Electron Capture ◽  
Degenerate Electron ◽  
Dense Stars ◽  
Capture Rates

Stellar electron-capture rates on nuclei based on a microscopic Skyrme functional

2012 ◽  
Vol 86 (3) ◽  
Author(s):  
A. F. Fantina ◽  
E. Khan ◽  
G. Colò ◽  
N. Paar ◽  
D. Vretenar
Keyword(s):  
Electron Capture ◽  
Capture Rates

Measurement of Absolute Electron Capture Rates with an Application to the Decay ofNi57

1950 ◽  
Vol 80 (1) ◽  
pp. 30-33 ◽  
Author(s):  
G. Friedlander ◽  
M. L. Perlman ◽  
D. Alburger ◽  
A. W. Sunyar
Keyword(s):  
Electron Capture ◽  
Capture Rates

Study of Gamow–Teller strength and associated weak-rates on odd-A nuclei in stellar matter

2018 ◽  
Vol 27 (03) ◽  
pp. 1850019 ◽  
Author(s):  
Muhammad Majid ◽  
Jameel-Un Nabi ◽  
Muhammad Riaz
Keyword(s):  
Electron Capture ◽  
Theoretical Calculations ◽  
Random Phase ◽  
Measured Data ◽  
Particle Model ◽  
Transition Strength ◽  
Positron Emission ◽  
Stellar Temperature ◽  
Gamow Teller ◽  
Capture Rates

In a recent study by Cole et al. [A. L. Cole et al., Phys. Rev. C 86 (2012) 015809], it was concluded that quasi-particle random phase approximation (QRPA) calculations show larger deviations and overestimate the total experimental Gamow–Teller (GT) strength. It was also concluded that QRPA calculated electron capture rates exhibit larger deviation than those derived from the measured GT strength distributions. The main purpose of this study is to probe the findings of the Cole et al. paper. This study gives useful information on the performance of QRPA-based nuclear models. As per simulation results, the capturing of electrons that occur on medium heavy isotopes have a significant role in decreasing the ratio of electron-to-baryon content of the stellar interior during the late stages of core evolution. We report the calculation of allowed charge-changing transitions strength for odd-[Formula: see text] [Formula: see text]-shell nuclei ([Formula: see text]Sc and [Formula: see text]Mn) by employing the deformed pn-QRPA approach. The computed GT transition strength is compared with previous theoretical calculations and measured data. For stellar applications, the corresponding electron capture rates are computed and compared with rates using previously calculated and measured GT values. Our finding shows that our calculated results are in decent accordance with measured data. At higher stellar temperature, our calculated electron capture rates are larger than those calculated by independent particle model (IPM) and shell model. It was further concluded that at low temperature and high density regions, the positron emission weak-rates from [Formula: see text]Sc and [Formula: see text]Mn may be neglected in simulation codes.

scholarly journals Search for Double Beta Decay of 106Cd with an Enriched 106CdWO4 Crystal Scintillator in Coincidence with CdWO4 Scintillation Counters

Universe ◽  
2020 ◽  
Vol 6 (10) ◽  
pp. 182
Author(s):  
Pierluigi Belli ◽  
R. Bernabei ◽  
V.B. Brudanin ◽  
F. Cappella ◽  
V. Caracciolo ◽  
...  
Keyword(s):  
Electron Capture ◽  
Beta Decay ◽  
Ground State ◽  
Half Life ◽  
Double Beta Decay ◽  
Cadmium Tungstate ◽  
Positron Emission ◽  
Double Electron ◽  
Theoretical Predictions ◽  
Crystal Scintillator

Studies on double beta decay processes in 106Cd were performed by using a cadmium tungstate scintillator enriched in 106Cd at 66% (106CdWO4) with two CdWO4 scintillation counters (with natural Cd composition). No effect was observed in the data that accumulated over 26,033 h. New improved half-life limits were set on the different channels and modes of the 106Cd double beta decay at level of limT1/2∼1020−1022 yr. The limit for the two neutrino electron capture with positron emission in 106Cd to the ground state of 106Pd, T1/22νECβ+≥2.1×1021 yr, was set by the analysis of the 106CdWO4 data in coincidence with the energy release 511 keV in both CdWO4 counters. The sensitivity approaches the theoretical predictions for the decay half-life that are in the range T1/2∼1021−1022 yr. The resonant neutrinoless double-electron capture to the 2718 keV excited state of 106Pd is restricted at the level of T1/20ν2K≥2.9×1021 yr.

Sign in / Sign up

Export Citation Format

Share Document