High-spin states in148Tb

Ideguchi, E.; Gono, Y.; Mitarai, S.; Morikawa, T.; Odahara, A.; Kidera, M.; Sibata, M.; Tsuchida, Hideo; Miyazaki, Kazuhiro; Oshima, M.; Hatsukawa, Y.; Hamada, S.; Iimura, H.; Shibata, Masataka; Ishii, T.; Murakami, Takeshi; Kusakari, H.; Sugawara, M.; Kishida, T.; Morita, Kosuke; Kumagai, H.; Ishihara, M.

doi:10.1007/bf01299753

Cited by 18 publications

(10 citation statements)

References 11 publications

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“…Fig. 3 shows the spectra associated with the previously reported isomers in 147 Gd [11] and 148 Tb [12] as observed in the current work following projectile fragmentation with the 208 Pb beam. The isomer in 148 Tb has an angular momentum of 27 h, which corresponds to the highest discrete angular momentum observed to date in projectile fragmentation reactions.…”

Section: Charge State Separation and Internal Conversion Suppressionmentioning

confidence: 56%

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Recent results in fragmentation isomer spectroscopy with rising

Piétri

Regan

Podolyák

et al. 2007

Nuclear Instruments and Methods in Physics Research Section B:

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Section: Charge State Separation and Internal Conversion Suppressionmentioning

confidence: 56%

“…3. c-Ray spectra associated with the decays of the high-spin isomers in 147 Gd [11] and 148 Tb [12] as observed following the projectile of the 208 Pb beam. These decays represent the highest discrete spins observed to date in projectile fragmentation reactions.…”

Section: Discussionmentioning

confidence: 99%

Recent results in fragmentation isomer spectroscopy with rising

Piétri

Regan

Podolyák

et al. 2007

Nuclear Instruments and Methods in Physics Research Section B:

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“…Among the N = 83 isotones, high-spin isomers have been reported at ≈9-MeV excitation energy in 143 Nd [1], 144 Pm [2], 145 Sm [3], 146 Eu [4], 147 Gd [5], 148 Tb [6],…”

Section: Introductionmentioning

confidence: 99%

Gamma-ray and conversion-electron spectroscopy of the high-spin isomer in 145Sm

Gerathy,

Lane,

Stuchbery

et al. 2020

Preprint

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Background: High-spin isomers at ≈9-MeV excitation energies have been reported in several N = 83 isotones near Z = 64. Spin and parity assignments of J π = 49/2 + remain tentative for a number of these states in the odd-A nuclei.Purpose: To study the decay of the (49/2 + ) high-spin isomer in 145 Sm, make firm spin and parity assignments to the isomer and states populated in its decay, and investigate the structure of the nucleus. Methods:The 145 Sm isomer was populated in the 124 Sn( 26 Mg,5n) reaction. Gamma-ray and conversion-electron data were collected using the Solenogam array.Results: A revised lifetime of t 1/2 = 3.52( 16) µs was measured for the high-spin isomer. Several new states have been added to the level scheme, and a new state at 8815 keV is proposed as the isomer, based on decayproperty systematics, transition strengths, and spin and parity assignments. Firm spin and parity assignments have been made to states up to and including the isomer and the new level scheme is interpreted using shell-model calculations performed with the KShell program. Conclusions:The interpretation of the 49/2 + isomer as a deformed excitation of the core neutrons remains unchanged, although there has been a significant revision of the level scheme below the isomer, and hence significant reinterpretations of the lower-lying states.

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“…The substantial evidence for a subshell gap at proton number Z = 64 [1] triggered a great deal of work on proton-rich nuclei in the A ≈ 150 mass region [2][3][4][5][6][7]. The similarities between the doubly magic nuclei 146 Gd and 208 Pb [1] and the expected influence of the proton-neutron interaction on structural features as observed in the 100 Sn region [3,[8][9][10]] also fueled further interest.…”

Section: Introductionmentioning

confidence: 99%

“…In an empirical approach, this interaction is extracted from the data or taken from systematics [2,4,5]. For example, experimental knowledge of the structure of 148 65 Tb 83 [6] determines the π 0h 11/2 -ν1f 7/2 interaction or that of 146 63 Eu 83 [7] fixes the (π 0h 11/2 ) −1 -ν1f 7/2 interaction. In contrast, modern shell-model calculations can be performed by utilizing a nucleon-nucleon interaction derived from first principles.…”

Section: Introductionmentioning

confidence: 99%

Level structure above the 17+ isomeric state in Tm8369152

Singh¹,

Cullen²,

Taylor³

et al. 2018

Phys. Rev. C

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Excited states above the 17 + isomeric state in the proton-rich nucleus 152 Tm were established by employing the recoil-isomer tagging technique. Data were collected using the JUROGAM gamma-ray array and the GREAT spectrometer together with the recoil ion transport unit (RITU) gas-filled recoil separator and analyzed to identify the prompt and delayed γ decays from the levels in 152 Tm. Shell-model calculations, either in a large valence space or in a reduced model space with five protons in the π 0h 11/2 orbital and one neutron in the ν1f 7/2 orbital, agree with the observed energies of the yrast levels up to angular momentum J = 21. The observation of near degeneracies in the energy spectrum can be attributed to specific components of the proton-neutron interaction. The isomeric decay of the 17 + level is not reproduced in the shell-model calculations as it arises from a delicate balance between hindrance due to seniority selection rules and enhancement due to configuration mixing.

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High-spin states in148Tb

Cited by 18 publications

References 11 publications

Recent results in fragmentation isomer spectroscopy with rising

Recent results in fragmentation isomer spectroscopy with rising

Gamma-ray and conversion-electron spectroscopy of the high-spin isomer in 145Sm

Level structure above the 17+ isomeric state in Tm8369152

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