Recoil-distance Doppler-shift lifetime measurement of low-lying superdeformed states in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow /><mml:mrow><mml:mn>194</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>Hg

Kühn, Reimer; Dewald, Α.; Krücken, R.; Meier, Christoph; Peusquens, R.; Tiesler, H.; Vogel, O.; Kasemann, S.; Brentano, P. von; Bazzacco, D.; Rossi‐Alvarez, C.; Lunardi, S.; Boer, Jessica de

doi:10.1103/physrevc.55.r1002

Phys. Rev. C

1997

DOI: 10.1103/physrevc.55.r1002

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Recoil-distance Doppler-shift lifetime measurement of low-lying superdeformed states in194Hg

Reimer Kühn

Α. Dewald

R. Krücken

et al.

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Cited by 23 publications

(14 citation statements)

References 24 publications

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“…Recent experimental data given in Refs. [7][8][9][10] have been analyzed using some of these results.…”

mentioning

confidence: 99%

“…The spreading widths G # deduced from the data reviewed in Ref. [9] for a number of nuclei. The spin values of the decaying states are given in parentheses.…”

mentioning

confidence: 99%

“…The results indicated with the y were calculated with the estimated lifetimes in Ref. [9]. The total width G G S 1 G # .…”

mentioning

confidence: 99%

“…We have applied this result to data given in Refs. [7][8][9][10]. The measured quantities are F exp , the intensity reduction for E2 decay from the state j0͘ with spin I 0 , and the lifetime t of that state.…”

mentioning

confidence: 99%

“…Motivated by the later results of Refs. [7][8][9][10], we have investigated the regime G N ¿ G # , G S . Naturally, decay out of the SD band follows different rules in the two regimes.…”

mentioning

confidence: 99%

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Spreading Width for Decay Out of a Superdeformed Band

1998

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The attenuation factor F responsible for the decay out of a superdeformed (SD) band is calculated with the help of a statistical model. This factor is given by F ͑1 1 G # ͞G S ͒ 21 . Here, G S is the width for the collective E2 transition within the superdeformed band, and G # is the spreading width which describes the mixing between a state in the SD band and the normally deformed (ND) states of equal spin. The attenuation factor F is independent of the statistical E1 decay widths G N of the ND states provided that G N ¿ G # , G S . This condition is generically met. Previously measured values of F are used to determine G # . [S0031-9007(98)

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“…Recent experimental data given in Refs. [7][8][9][10] have been analyzed using some of these results.…”

mentioning

confidence: 99%

“…The spreading widths G # deduced from the data reviewed in Ref. [9] for a number of nuclei. The spin values of the decaying states are given in parentheses.…”

mentioning

confidence: 99%

“…The results indicated with the y were calculated with the estimated lifetimes in Ref. [9]. The total width G G S 1 G # .…”

mentioning

confidence: 99%

mentioning

confidence: 99%

“…Motivated by the later results of Refs. [7][8][9][10], we have investigated the regime G N ¿ G # , G S . Naturally, decay out of the SD band follows different rules in the two regimes.…”

mentioning

confidence: 99%

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Spreading Width for Decay Out of a Superdeformed Band

1998

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Application of the SCC method to the multi-O(4) model: The collective Hamiltonian

Kobayasi

2009

Sci. China Ser. G-Phys. Mech. Astron.

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The collective Hamiltonian up to the fourth order for a multi-O(4) model is derived for the first time based on the self-consistent collective-coordinate (SCC) method, which is formulated in the framework of the time-dependent Hartree-Bogoliubov (TDHB) theory. This collective Hamiltonian is valid for the spherical case where the HB equilibrium point of the multi-O(4) model is spherical as well as for the deformed case where the HB equilibrium points are deformed. Its validity is tested numerically in both the spherical and deformed cases. Numerical simulations indicate that the low-lying states of the collective Hamiltonian and the transition amplitudes among them mimic fairly well those obtained by exactly diagonalizing the Hamiltonian of the multi-O(4) model. The numerical results for the deformed case imply that the "optimized RPA boundary condition" is also valid for the well-known η * , η expansion around the unstable HB point of the multi-O(4) model. All these illuminate the power of the SCC method.self-consistent collective-coordinate method, multi-O(4) model, time-dependent Hartree-Bogoliubov theory, collective Hamiltonian Atomic nuclei exhibit rich collective motions: rotational, vibrational, wobbling, fission, fusion and shape coexistence motions. They are the collective excitations of nucleons. A powerful tool for understanding both low-lying collective states and giant resonances is the random phase approximation(RPA), the approximation, which should be good for collective vibrations as long as their amplitudes are small. One has to go beyond the RPA in order to describe kinds of large amplitude collective motions (LACM)such as fission and shape coexistence. Microscopic understanding of the LACM is a long-standing fundamental subject of nuclear structure physics.A useful microscopic tool for describing the LACM is the generator coordinate method (GCM) [1−4] . The GCM wave function is usually taken as a combination of many intrinsic states, calculated self-consistently within constrained Hartree-Fock-Bogoliubov (HFB) theory. The constraining operators define collective degrees of freedom. The GCM wave function is rich enough to accommodate correlation absent in the mean field and is not limited to the adiabatic

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Nuclear Data Sheets for A = 194

Singh

2006

Nuclear Data Sheets

114

101

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Recoil-distance Doppler-shift lifetime measurement of low-lying superdeformed states in194Hg

Cited by 23 publications

References 24 publications

Spreading Width for Decay Out of a Superdeformed Band

Spreading Width for Decay Out of a Superdeformed Band

Application of the SCC method to the multi-O(4) model: The collective Hamiltonian

Nuclear Data Sheets for A = 194

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