STUDY OF LOW-LYING STATES VIA EC/β+ DECAY FOR MEDIUM-HEAVY NUCLEI

2008 ◽  
Vol 17 (supp01) ◽  
pp. 1-7 ◽  
Author(s):  
S.-W. XU ◽  
Y.-X. XIE ◽  
Z.-K. LI ◽  
Q.-Y. PAN ◽  
X.-D. WANG ◽  
...  
Keyword(s):  
Experimental Method ◽  
Isomeric State ◽  
Heavy Nuclei ◽  
Β Decay ◽  
Model Calculations

Our previous experimental method and results of ( EC +β+) decay for the medium-heavy nuclei 153 Er , 157 Yb , 209 Fr , 128 Ce , 130 Ce , 128 Pr , 130 Pm and 140 Tb have been briefly summarized. The observed low-lying states in their daughter nuclei and a 11/2- isomeric state in 133 Pr have been reviewed in a systematic way and compared with different model calculations. Finally, some questions have been put forward for further study and discussion.

scholarly journals An upgraded algorithm for shell model calculations and its implementation in medium-heavy nuclei

2011 ◽  
Vol 267 ◽  
pp. 012026
Author(s):  
D Bianco ◽  
F Andreozzi ◽  
N Lo Iudice ◽  
A Porrino ◽  
F Knapp
Keyword(s):  
Shell Model ◽  
Heavy Nuclei ◽  
Model Calculations

scholarly journals CHARGE RADII OF β-STABLE NUCLEI

2006 ◽  
Vol 21 (24) ◽  
pp. 1889-1900 ◽  
Author(s):  
G. K. NIE
Keyword(s):  
Stable Isotopes ◽  
Stable Isotope ◽  
Electron Scattering ◽  
Cluster Structure ◽  
Alpha Decay ◽  
Heavy Nuclei ◽  
Β Decay ◽  
Charge Radii ◽  
The Core

In a previous work it was shown that the radius of a nucleus R is determined by the α-cluster structure and can be estimated on the number of α-clusters disregarding the number of excess neutrons. A hypothesis was also made that the radius Rm of a β-stable isotope, which is actually measured at electron scattering experiments, is determined by the volume occupied by the matter of the core plus the volume occupied by the charge of the peripheral α-clusters. In this paper it is shown that the condition Rm = R restricts the number of excess neutrons filling the core to provide the β-stability. The number of peripheral clusters can vary from 1 to 5 and the value of R for heavy nuclei almost does not change, whereas the number of the excess neutrons should change with the number of peripheral clusters to provide the condition of Rm = R. It can explain the path of the β-stability and its width. The radii Rm of the stable isotopes with 12 ≤ Z ≤ 83 and the alpha-decay isotopes with 84 ≤ Z ≤ 116 that are stable to β-decay have been calculated.

Unique first-forbidden β-decay transitions in odd–odd and even–even heavy nuclei

2017 ◽  
Vol 957 ◽  
pp. 1-21 ◽  
Author(s):  
Jameel-Un Nabi ◽  
Necla Çakmak ◽  
Muhammad Majid ◽  
Cevad Selam
Keyword(s):  
Heavy Nuclei ◽  
Β Decay

An Evaluation of Rotational Isomeric State Model Calculations of Hydrocarbon Chains, with and without Excluded Volume

1980 ◽  
Vol 13 (3) ◽  
pp. 699-704 ◽  
Author(s):  
Mitchell A. Winnik ◽  
David Rigby ◽  
R. F. T. Stepto ◽  
Bernard Lemaire
Keyword(s):  
Isomeric State ◽  
State Model ◽  
Excluded Volume ◽  
Model Calculations ◽  
Rotational Isomeric State ◽  
Hydrocarbon Chains

Low-lying isomeric state in [sup 80]Ga from the β− decay of [sup 80]Zn

2012 ◽  
Author(s):  
R. Licǎ ◽  
N. Mărginean ◽  
D. G. Ghiţă ◽  
H. Mach ◽  
L. M. Fraile ◽  
...  
Keyword(s):  
Isomeric State ◽  
Β Decay

scholarly journals Gamow-Teller transitions of neutron-rich N = 82, 81 nuclei by shell-model calculations

2021 ◽  
Author(s):  
Noritaka Shimizu ◽  
Tomoaki Togashi ◽  
Yutaka Utsuno
Keyword(s):  
Shell Model ◽  
Large Scale ◽  
Β Decay ◽  
Excitation Energies ◽  
Pauli Blocking ◽  
Model Calculations ◽  
Model Hamiltonian ◽  
R Process ◽  
Gamow Teller ◽  
Valence Proton

Abstract β-decay half-lives of neutron-rich nuclei around N = 82 are key data to understand the r-process nucleosynthesis. We performed large-scale shell-model calculations in this region using a newly constructed shell-model Hamiltonian, and successfully described the low-lying spectra and half-lives of neutron-rich N = 82 and N = 81 isotones with Z = 42 − 49 in a unified way. We found that their Gamow-Teller strength distributions have a peak in the low-excitation energies, which significantly contributes to the half-lives. This peak, dominated by ν0g7/2 → π0g9/2 transitions, is enhanced on the proton deficient side because the Pauli-blocking effect caused by occupying the valence proton 0g9/2 orbit is weakened.

Identification of a new isomeric state in Zn76 following the β decay of Cu76

2021 ◽  
Vol 104 (5) ◽  
Author(s):  
A. Chester ◽  
B. A. Brown ◽  
S. P. Burcher ◽  
M. P. Carpenter ◽  
J. J. Carroll ◽  
...  
Keyword(s):  
Isomeric State ◽  
Β Decay
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