TY - JOUR

T1 - Gamow-Teller strength of [Formula Presented]Nb in the continuum studied via multipole decomposition analysis of the [Formula Presented]Zr[Formula Presented] reaction at 295 MeV

AU - Wakasa, T.

AU - Sakai, H.

AU - Okamura, H.

AU - Otsu, H.

AU - Fujita, S.

AU - Ishida, S.

AU - Sakamoto, N.

AU - Uesaka, T.

AU - Satou, Y.

AU - Greenfield, M. B.

AU - Hatanaka, K.

PY - 1997

Y1 - 1997

N2 - The double differential cross sections at [Formula Presented] between [Formula Presented] and [Formula Presented] and the polarization transfer [Formula Presented] at [Formula Presented] for the [Formula Presented] reaction are measured at a bombarding energy of 295 MeV. A multipole decomposition technique is applied to the cross sections to extract [Formula Presented], [Formula Presented], [Formula Presented], and [Formula Presented] contributions. The Gamow-Teller (GT) strength [Formula Presented] in the continuum deduced from the [Formula Presented] cross section is compared both with the perturbative calculation by Bertsch and Hamamoto and with the second-order random phase approximation calculation by Drożdż et al. The sum of [Formula Presented] values up to 50 MeV excitation becomes [Formula Presented]=28.0±1.6 after subtracting the contribution of the isovector spin-monopole strength. This [Formula Presented] value of 28.0[Formula Presented]1.6 corresponds to about (93 [Formula Presented] 5)% of the minimum value of the sum rule [Formula Presented]=30. The usefulness of the polarization transfer observable in the distorted wave impulse approximation is presented.

AB - The double differential cross sections at [Formula Presented] between [Formula Presented] and [Formula Presented] and the polarization transfer [Formula Presented] at [Formula Presented] for the [Formula Presented] reaction are measured at a bombarding energy of 295 MeV. A multipole decomposition technique is applied to the cross sections to extract [Formula Presented], [Formula Presented], [Formula Presented], and [Formula Presented] contributions. The Gamow-Teller (GT) strength [Formula Presented] in the continuum deduced from the [Formula Presented] cross section is compared both with the perturbative calculation by Bertsch and Hamamoto and with the second-order random phase approximation calculation by Drożdż et al. The sum of [Formula Presented] values up to 50 MeV excitation becomes [Formula Presented]=28.0±1.6 after subtracting the contribution of the isovector spin-monopole strength. This [Formula Presented] value of 28.0[Formula Presented]1.6 corresponds to about (93 [Formula Presented] 5)% of the minimum value of the sum rule [Formula Presented]=30. The usefulness of the polarization transfer observable in the distorted wave impulse approximation is presented.

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U2 - 10.1103/PhysRevC.55.2909

DO - 10.1103/PhysRevC.55.2909

M3 - Article

AN - SCOPUS:0031507377

VL - 55

SP - 2909

EP - 2922

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 6

ER -