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Article
New levels and reinvestigation of octupole correlations in 146,147La
High spin states of neutron-rich 146,147La have been reinvestigated by \(\gamma\) ...
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Chapter
New Insights into the Structure of Neutron-Rich Nuclei \(A=108-118\) and \(^{160-162}\) Gd
The level structures of \(^{108,110,112}\) Ru ( \(Z=44\) ...
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Article
One-phonon octupole vibrational states in 211At, 212Rn, 213Fr and 214Ra with N = 126
Excited high spin states in 211At, 212Rn, 213Fr and 214Ra with N = 126 are reorganized and interpreted in terms of the stretched weak coupling of an octupole 3− phonon. Nearly identical sequences of levels with Δ...
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Article
One-phonon octupole vibrational states in 136Xe, 137Cs, 138Ba, 140Ce and 142Nd with N = 82
Excited high spin states in 136Xe, 137Cs, 138Ba, 140Ce and 142Nd with N = 82 are reorganized and interpreted in terms of the weak coupling mode of an octupole 3− phonon. Nearly identical sequences of levels with
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Article
New multi-phonon gamma vibrational bands in A∼110 neutron-rich nuclei
The high spin states of neutron-rich 103Nb, 107Tc and 109Tc nuclei in A∼110 region have been investigated by measuring prompt γ-γ-γ coincident measurements populated with the spontaneous fission of 252Cf with the...
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Article
Open AccessHigh-spin states and a new band based on the isomeric state in 152Nd
High-spin states of the neutron-rich 152Nd nucleus have been reinvestigated by measuring the prompt \( \gamma\) -rays in the spontaneous fission of 252Cf . The ground-state band ...
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Article
Identification of the 109Xe and 105Te α-decay chain
The α-decay chain 109Xe → 105Te → 101Sn was identified at the Holifield Radioactive Ion Beam Facility. Advances in digital electronics have made possible the identification of both alpha emitters in the same expe...
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Article
Experiment aimed at the study of 252Cf binary and ternary fission
A new experiment devoted to the fission of 252Cf is described. It continued a series of our experiments based on correlation measurements of γ rays emitted by fission fragment pairs. The measurements of γ-γ and γ...
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Article
Bimodal fission in binary and ternary spontaneous fission of 252Cf
The hot bimodal fission of 252Cf is reexamined with new high-statistics data. We constructed a γ-γ-γ coincidence cube for binary fission and LCP-gated γ-γ matrix for ternary fission. By identifying the secondary ...
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Article
Collective bands in 104,106,108Mo
We have used our analysis of γ-γ-γ data (5.7 × 1011 triples and higher folds) taken with Gammasphere from prompt γ rays emitted in the spontaneous fission of 252Cf to study the collective bands in 104,106,108Mo. ...
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Article
Investigations of short half-life states from SF of 252Cf
By using different time-gated triple γ coincidence data, the half-lives (T1/2) of several short lived states in neutron-rich nuclei have been studied. The first excited states in the ground state bands often deca...
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Article
Shape transitions and triaxiality in neutron-rich odd-mass Y and Nb isotopes
New level schemes of 99, 101Y and 101, 105Nd are established based on the measurement of prompt γ-rays from the fission of 252Cf at Gammasphere. Triaxial-rotor-plus-particle model calculations and fitting suggest...
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Article
Study of the N = 77 odd- Z isotones near the proton-drip line
The evolution of the πh11/2νh11/2 and πh11/2νs1/2 isomeric configurations was studied for the N = 77 isotones near the proton drip line. The decays of metastable levels in 140Eu, 142Tb , and 144Ho were measured b...
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Article
Soft chiral vibrations in 106Mo
High-spin states in neutron-rich 106Mo were investigated by detecting the prompt γ-rays in the spontaneous fission of 252Cf with Gammasphere. Several new bands are observed. Two sets of ΔI = 1 bands in 106Mo are ...
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Article
Coulomb excitation and transfer reactions with neutron-rich radioactive beams
Neutron-rich radioactive ion beams available from the HRIBF allow a variety of measurements around the 132Sn region, including Coulomb excitation and single-nucleon transfer. The B(E2;0+ → 2+) values for first 2+
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Article
Unexpected rapid variations in odd-even level staggering in gamma-vibrational bands
Triple-γ coincidence data were used to study the γ-vibrational bands to 14+ in 104-106Mo, to 13+ in 108,110Ru and 17+ in 112Ru, and to 13+, 15+ in 112-116Pd. The even-odd spin energy level splittings show rapid v...
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Article
Identification of levels in 162, 164Gd and decrease in moment of inertia between N = 98-100
From prompt γ-γ-γ coincidence studies with a 252Cf source, the yrast levels were identified from 2+ to 16+ and 14+ in neutron-rich 162,164Gd, respectively. Transition energies between the same spin states are hig...
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Article
Beta-delayed γ and neutron emission near the double shell closure at 78Ni
An experiment was performed at the National Superconducting Cyclotron Laboratory at Michigan State University to investigate β decay of very neutron-rich cobalt isotopes. Beta-delayed neutron emission from 71-74C...
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Article
Half-life measurement of excited states in neutron-rich nuclei
Half-lives (T1/2) of several states which decay by delayed γ transitions were determined from time-gated triple γ coincidence method. We determined, for the first time, the half-life of 330.6 + x state in 108Tc a...
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Article
Angular momenta of fission fragments in the α-accompanied fission of 252Cf
For the first time, average angular momenta of the ternary fission fragments 100, 102Zr, 106Mo, 144, 146Ba and 138, 140, 142Xe from the α-accompanied fission of 252Cf were obtained from relative intensities of pr...