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Recently, experimental researches on the $\alpha$ decay with long lifetime are one of hot topics in the contemporary nuclear physics [e.g. N. Kinoshita {\sl et al.} (2012) and J. W. Beeman {\sl et al.} (2012) ]. In this study, we have…

核理论 · 物理学 2014-10-13 Yibin Qian , Zhongzhou Ren

In an experiment performed at the Facility for Rare Isotope Beams (FRIB) using the FRIB Decay Station initiator (FDSi), 15 new half lives of isotopes near $^{54}$Ca were measured. A new method of extracting lifetimes from experimental data,…

In the present work, we systematically study the proton radioactivity half-lives of 33 spherical nuclei based on the relationship between the Skyrme parameters and the macroscopic quantities of nuclear matter. Using the two-potential…

核理论 · 物理学 2022-10-05 Jun-Hao Cheng , Zhen Zhang , Xi-Jun Wu , Peng-Cheng Chu , Xiao-Hua Li

Superheavy nuclei are investigated in a nonlinear chiral SU(3)-model. The proton number Z=120 and neutron numbers of N=172, 184 and 198 are predicted to be magic. The charge distributions and alpha-decay chains hint towards a hollow…

核理论 · 物理学 2007-05-23 Ch. Beckmann , P. Papazoglou , D. Zschiesche , S. Schramm , H. Stoecker , W. Greiner

The experimentally available data on the alpha decay half lives and Q? values for 96 superheavy nuclei are used to fix the parameters for a modified version of the Brown empirical formula through two fitting procedures which enables its…

核理论 · 物理学 2016-04-06 A. I. Budaca , R. Budaca , I. Silisteanu

The structure of the doubly magic $^{132}_{50}$Sn$_{82}$ has been investigated at the ISOLDE facility at CERN, populated both by the $\beta^-$decay of $^{132}$In and $\beta^-$-delayed neutron emission of $^{133}$In. The level scheme of…

The half lives for various clusters lying in the cold reaction valleys of {210-226}^Ra isotopes are computed using our Coulomb and proximity potential model (CPPM). The computed half lives of 4^He and 14^C clusters from {210-226}^Ra…

核理论 · 物理学 2015-06-04 K. P. Santhosh , Sabina Sahadevan , B. Priyanka , M. S. Unnikrishnan

The purpose of the NEMO3 experiment is to detect neutrinoless double beta decay in order to determine the nature of neutrino and its absolute mass. We analysed the 389 effective days of data from the $\sim 7$ kg of $^{100}$Mo and $\sim 1$…

高能物理 - 实验 · 物理学 2016-08-31 J. S Ricol

We investigate {\alpha}-decay half-lives for 74 {\le} Z {\le} 92 even-even nuclei within the semiclassical WKB approximation in deformed relativistic Hartree-Bogoliubov theory in continuum (DRHBc). The {\alpha}-particle preformation factors…

核理论 · 物理学 2023-12-14 Yong-Beom Choi , Chang-Hwan Lee , Myeong-Hwan Mun , Soonchul Choi , Youngman Kim

Metastable states with T$_{1/2}$ = 8(2) ms in $^{205}$Bi and T$_{1/2}$ = 0.22(2) ms in $^{204}$Pb, with $\approx $ 8 MeV excitation energy and angular momentum $\ge $ 22 $\hbar $, have been established. These represent, by up to two orders…

A new experiment based on tin-loaded scintillator is proposed to measure the 2nu double beta decay half-life of Sn-124 for the first time. Measurements of long term stabilitiy and optical properties of the produced scintillator are…

仪器与探测器 · 物理学 2017-07-26 O. Chkvorets , C. Kraus , J. Kuettler , V. Lozza , B. von Krosigk , K. Zuber

Background: For nuclei heavier than $^{208}$Pb $\alpha$ decay is a dominating decay mode, and in the search of new superheavy elements one often observes chains of $\alpha$ decays. Purpose: Explore and test microscopic descriptions of…

核理论 · 物理学 2014-02-11 D. E. Ward , B. G. Carlsson , S. Åberg

A preferred candidate for neutrinoless double-{\beta} decay, 150Nd, is present in natural neodymium at an abundance level of 5.64%. However, neodymium could be activated by cosmic rays during the period it spends on the Earth's surface. Its…

核实验 · 物理学 2012-02-24 O. Lebeda , V. Lozza , P. Schrock , J. Štursa , K. Zuber

Nuclear $\beta$-decay in magic nuclei is investigated, taking into account the coupling between particle and collective vibrations,on top of self-consistent random phase approximation calculations based on Skyrme density functionals. The…

核理论 · 物理学 2015-04-16 Yifei Niu , Zhongming Niu , Gianluca Colo , Enrico Vigezzi

An attempt to study the feasibility of a new experiment to search for double beta decay in $^{112}$Sn and $^{124}$Sn was carried out by using ultra-low background HPGe detector (244 cm$^{3}$) inside the Gran Sasso National Laboratory (LNGS)…

Beyond uranium heavy elements rapidly become increasingly unstable with respect to spontaneous fission as the proton number Z increases, because of the disruptive effect of the long-range Coulomb force. However, in the region just beyond Z…

核理论 · 物理学 2009-10-30 Peter Moller , J. Rayford Nix

Superheavy dark matter may show its presence in high energy neutrino signals detected on earth. From the latest results of IceCube, we could set the strongest lower bound on the lifetime of dark matter beyond 100 TeV around $10^{28} {\rm…

高能物理 - 唯象学 · 物理学 2015-07-28 Carsten Rott , Kazunori Kohri , Seong Chan Park

We have performed a shell-model study of the two nuclei 210Po and 206Hg, having and lacking two protons with respect to doubly magic 208Pb. In our calculations we have employed realistic effective interactions derived from the Bonn A…

核理论 · 物理学 2007-05-23 L. Coraggio , A. Covello , A. Gargano

We report on Hartree-Fock-Bogoliubov (HFB) calculations of the ground-state rotationnal band of the heavy nucleus $^{254}$No recently observed experimentally. The calculated quadrupole deformation is consistent with the experimental value…

核理论 · 物理学 2009-11-06 H. Laftchiev , D. Samsoen , P. Quentin , J. Piperova

The results by A.S. Barabash [Phys. Rev. {\bf C 81}, 035501 (2010)] are shown to be incomplete. Tellurium data sets were reanalyzed using the best practices of ENSDF evaluations. Present analysis indicates much higher value for the…

核理论 · 物理学 2010-05-17 B. Pritychenko