Direct proton decay from the Gamow-Teller resonance in Bi208

H. Akimune; I. Daito; Y. Fujita; M. Fujiwara; M. B. Greenfield; M. N. Harakeh; T. Inomata; J. Jänecke; K. Katori; S. Nakayama; H. Sakai; Y. Sakemi; M. Tanaka; M. Yosoi

doi:10.1103/PhysRevC.52.604

Direct proton decay from the Gamow-Teller resonance in Bi208

H. Akimune, I. Daito, Y. Fujita, M. Fujiwara, M. B. Greenfield, M. N. Harakeh, T. Inomata, J. Jänecke, K. Katori, S. Nakayama, H. Sakai, Y. Sakemi, M. Tanaka, M. Yosoi

Research output: Contribution to journal › Article › peer-review

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Abstract

Spin-isospin excitations in Bi208 have been investigated using the Pb208 (3He,t)208Bi reaction at near 0°at E(3He)=450 MeV. The microscopic structure of the Gamow-Teller resonance (GTR), the isobaric analog state (IAS), and the spin-flip dipole (L=1) resonance (SDR) in Bi208 has been studied by observing their direct proton decays to the low-lying neutron-hole states in Pb207. Decay protons were measured at backward angles in coincidence with tritons detected at and near 0°. The total branching ratio for proton decay from the GTR is determined to be only 4.9 1.3%. The total branching ratio for proton decay from the SDR amounts to 14.14.2%. The deduced total widths as well as the total and partial proton escape widths of the GRR and IAS are found to be in reasonable agreement with recent theoretical estimates obtained in the framework of the continuum Tamm-Dancoff approximation.

Original language	English
Pages (from-to)	604-615
Number of pages	12
Journal	Physical Review C
Volume	52
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevC.52.604
Publication status	Published - 1995
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevC.52.604

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title = "Direct proton decay from the Gamow-Teller resonance in Bi208",

abstract = "Spin-isospin excitations in Bi208 have been investigated using the Pb208 (3He,t)208Bi reaction at near 0°at E(3He)=450 MeV. The microscopic structure of the Gamow-Teller resonance (GTR), the isobaric analog state (IAS), and the spin-flip dipole (L=1) resonance (SDR) in Bi208 has been studied by observing their direct proton decays to the low-lying neutron-hole states in Pb207. Decay protons were measured at backward angles in coincidence with tritons detected at and near 0°. The total branching ratio for proton decay from the GTR is determined to be only 4.9 1.3%. The total branching ratio for proton decay from the SDR amounts to 14.14.2%. The deduced total widths as well as the total and partial proton escape widths of the GRR and IAS are found to be in reasonable agreement with recent theoretical estimates obtained in the framework of the continuum Tamm-Dancoff approximation.",

author = "H. Akimune and I. Daito and Y. Fujita and M. Fujiwara and Greenfield, {M. B.} and Harakeh, {M. N.} and T. Inomata and J. J{\"a}necke and K. Katori and S. Nakayama and H. Sakai and Y. Sakemi and M. Tanaka and M. Yosoi",

year = "1995",

doi = "10.1103/PhysRevC.52.604",

language = "English",

volume = "52",

pages = "604--615",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

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TY - JOUR

T1 - Direct proton decay from the Gamow-Teller resonance in Bi208

AU - Akimune, H.

AU - Daito, I.

AU - Fujita, Y.

AU - Fujiwara, M.

AU - Greenfield, M. B.

AU - Harakeh, M. N.

AU - Inomata, T.

AU - Jänecke, J.

AU - Katori, K.

AU - Nakayama, S.

AU - Sakai, H.

AU - Sakemi, Y.

AU - Tanaka, M.

AU - Yosoi, M.

PY - 1995

Y1 - 1995

N2 - Spin-isospin excitations in Bi208 have been investigated using the Pb208 (3He,t)208Bi reaction at near 0°at E(3He)=450 MeV. The microscopic structure of the Gamow-Teller resonance (GTR), the isobaric analog state (IAS), and the spin-flip dipole (L=1) resonance (SDR) in Bi208 has been studied by observing their direct proton decays to the low-lying neutron-hole states in Pb207. Decay protons were measured at backward angles in coincidence with tritons detected at and near 0°. The total branching ratio for proton decay from the GTR is determined to be only 4.9 1.3%. The total branching ratio for proton decay from the SDR amounts to 14.14.2%. The deduced total widths as well as the total and partial proton escape widths of the GRR and IAS are found to be in reasonable agreement with recent theoretical estimates obtained in the framework of the continuum Tamm-Dancoff approximation.

AB - Spin-isospin excitations in Bi208 have been investigated using the Pb208 (3He,t)208Bi reaction at near 0°at E(3He)=450 MeV. The microscopic structure of the Gamow-Teller resonance (GTR), the isobaric analog state (IAS), and the spin-flip dipole (L=1) resonance (SDR) in Bi208 has been studied by observing their direct proton decays to the low-lying neutron-hole states in Pb207. Decay protons were measured at backward angles in coincidence with tritons detected at and near 0°. The total branching ratio for proton decay from the GTR is determined to be only 4.9 1.3%. The total branching ratio for proton decay from the SDR amounts to 14.14.2%. The deduced total widths as well as the total and partial proton escape widths of the GRR and IAS are found to be in reasonable agreement with recent theoretical estimates obtained in the framework of the continuum Tamm-Dancoff approximation.

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DO - 10.1103/PhysRevC.52.604

M3 - Article

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SN - 0556-2813

VL - 52

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EP - 615

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 2

ER -

Direct proton decay from the Gamow-Teller resonance in Bi208

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