Nuclear Structure ofNa22.I. Gamma-Ray Correlations and Lifetime Measurements for Levels ofEex<3.1MeV

1967 ◽  
Vol 160 (4) ◽  
pp. 938-963 ◽  
Author(s):  
E. K. Warburton ◽  
J. W. Olness ◽  
A. R. Poletti
Keyword(s):  
Nuclear Structure ◽  
Gamma Ray ◽  
Lifetime Measurements

GAMMA-RAY SPECTROSCOPY AT GANIL

2006 ◽  
Vol 15 (08) ◽  
pp. 1957-1965
Author(s):  
G. DE FRANCE
Keyword(s):  
Reaction Mechanism ◽  
Nuclear Structure ◽  
Nuclear Physics ◽  
Gamma Ray ◽  
Gamma Ray Spectroscopy ◽  
Comprehensive Picture ◽  
Clear Identification

Gamma-ray spectroscopy associated to the clear identification of the emitting nuclei is a key to understand in a coherent way the nuclear structure of the elements located far from stability. The coupling of very efficient gamma-ray arrays and spectrometers has pushed away the limits and opened up new possibilities in nuclear physics studies. These combinations give access to a comprehensive picture of both the reaction mechanism and the nuclear structure of a given nucleus. In this talk, the various possibilities offered at GANIL with such a coupling will be given.

Gamma-Ray Angular Correlations and Lifetime Measurements for Some Excited States ofNe21

1969 ◽  
Vol 186 (4) ◽  
pp. 1174-1188 ◽  
Author(s):  
J. G. Pronko ◽  
C. Rolfs ◽  
H. J. Maier
Keyword(s):  
Excited States ◽  
Gamma Ray ◽  
Lifetime Measurements ◽  
Angular Correlations

scholarly journals Nuclear structure study for the neutron-rich nuclei beyond 132Sn: In-beam gamma-ray spectroscopy of 136Sn and 132Cd

2018 ◽  
Vol 178 ◽  
pp. 02019
Author(s):  
He Wang ◽  
Nori Aoi ◽  
Satoshi Takeuchi ◽  
Masafumi Matsushita ◽  
Pieter Doornenbal ◽  
...  
Keyword(s):  
Nuclear Structure ◽  
Radioactive Isotope ◽  
Essential Role ◽  
Gamma Ray ◽  
Structure Study ◽  
Magic Nucleus ◽  
Nuclear Structure Study ◽  
Spectroscopic Information ◽  
Configuration Mixing ◽  
Neutron Configuration

The neutron-rich nuclei 136Sn and 132Cd have been studied in the purpose of nuclear structure for the nuclei beyond the doubly-magic nucleus 132Sn. The 2+1 → 0+ gs transitions were identified for these two nuclei using in-beam γ-ray spectroscopy in coincidence with one- and two-proton removal reactions, respectively, at the RIKEN Radioactive Isotope Beam Factory. The 2+ 1 state in 136Sn is found to be similar to that for 134Sn indicating the seniority scheme may also hold for the heavy tin isotopes beyond N = 82. For 132Cd, the 2+ 1 state provides the first spectroscopic information in the even-even nuclei locating in the region “southeast” of 132Sn and the result is discussed in terms of proton-neutron configuration mixing. In both these two nuclei, it was found that the valence neutrons play an essential role in their low-lying excitations.

scholarly journals Nuclear Structure Investigations of some Medium-Weight Isotopes

2021 ◽  
Author(s):  
◽  
Gavin Wallace
Keyword(s):  
Nuclear Structure ◽  
Beta Decay ◽  
Cross Section ◽  
Gamma Rays ◽  
Half Life ◽  
Decay Scheme ◽  
Gamma Ray ◽  
Calculated Cross Section ◽  
Beta Spectrum ◽  
Gamma Ray Detectors

<p>This thesis describes the methods and results of investigations made to determine the decay schemes of three short-lived isotopes 112Ag, 114Ag and 116Ag. A total of 76 gamma-rays was observed with a Ge(Li) detector in the gamma-radiation which follows the Beta-decay of 112Ag to levels of 112Cd. gamma- gamma coincidence and angular correlation measurements were made with Ge(Li)-NaI(T1) and NaI(T1)-NaI(T1) systems. A decay scheme consistent with the present data is proposed. Cross sections for the reactions 112Cd(n,p)112Ag and 115In(n, alpha)112Ag were measured, and the half-life of the 112Ag decay was found to be 3.14 plus-minus 0.01 hr. The decay scheme of 114Ag was studied with Ge(Li) gamma-ray detectors and plastic Beta-ray detectors. 9 of the 11 gamma-rays observed in the decay were incorporated into 114Cd level structure previously determined by conversion electron measurements on the 113Cd(n,gamma)114Cd reaction. The endpoint energy of the Beta-decay was determined as 4.90 plus-minus 0.26 MeV; no branching was evident in the Beta-spectrum. A decay scheme is proposed for which the Beta-branching was deduced from the measured gamma-ray yield and a calculated cross section value for the 114Cd(n,p)114Ag reaction. The 114Ag half-life was determined as 4.52 plus-minus 0.03 sec; a search for a previously reported isomeric state of 114Ag was unsuccessful. Ge(Li) and NaI(T1) gamma-ray detectors were used to study the direct and coincidence spectra that result from the decay of 116Ag, the half-life of which was found to be 2.50 plus-minus 0.02 min. 53 gamma-rays were observed from this decay. The Beta-branching to the 17 excited states of 116Cd in the proposed decay scheme was derived from the measured gamma-ray yield and a calculated cross section value for the 116Cd(n,p)Ag reaction. Spin and parity assignments for ihe energy levels of 116Cd are made. An investigation of the applicability of two collective models to nuclear structure typical of the Cd nuclei studied demonstrated that one of the models was misleading when applied to vibrational nuclei. A potential function was developed in the other model to extend the investigation to include a study of the transition between extremes of collective motion. This was used to examine the correspondence between nuclear level schemes representative of rotational and vibrational excitations.</p>

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