### Abstract

A complete set of polarization transfer coefficients has been measured for quasielastic [Formula Presented] reactions on [Formula Presented] [Formula Presented] and [Formula Presented] at a bombarding energy of 346 MeV and a laboratory scattering angle of [Formula Presented] The spin-longitudinal [Formula Presented] and spin-transverse [Formula Presented] response functions are extracted within a framework of a plane-wave impulse approximation with eikonal and optimal factorization approximations. The theoretically expected enhancement of [Formula Presented] is not observed. The observed [Formula Presented] is consistent with the pionic enhanced [Formula Presented] expected by random-phase approximation (RPA) calculations. On the contrary, a large excess of the observed [Formula Presented] is found in comparison with [Formula Presented] of the quasielastic electron scattering as well as of RPA calculations. This excess masks the effect of pionic correlations in [Formula Presented] The theoretical calculations are performed in a distorted-wave impulse approximation with RPA correlations, which indicates that the nuclear absorption effect depends on the spin direction. This spin-direction dependence is responsible in part for the excess of [Formula Presented]

Original language | English |
---|---|

Pages (from-to) | 3177-3195 |

Number of pages | 19 |

Journal | Physical Review C - Nuclear Physics |

Volume | 59 |

Issue number | 6 |

DOIs | |

Publication status | Published - Jan 1 1999 |

Externally published | Yes |

### Fingerprint

### All Science Journal Classification (ASJC) codes

- Nuclear and High Energy Physics

### Cite this

*Physical Review C - Nuclear Physics*,

*59*(6), 3177-3195. https://doi.org/10.1103/PhysRevC.59.3177

**Polarization transfer and spin response functions in quasielastic [Formula Presented] reactions at 346 MeV.** / Wakasa, Tomotsugu; Sakai, H.; Hatanaka, K.; Okamura, H.; Otsu, H.; Fujita, S.; Nonaka, T.; Uesaka, T.; Satou, Y.; Ohnishi, T.; Yokoyama, G.; Ishida, S.; Sakamoto, N.; Greenfield, M. B.; Ichimura, M.; Kawahigashi, K.

Research output: Contribution to journal › Article

*Physical Review C - Nuclear Physics*, vol. 59, no. 6, pp. 3177-3195. https://doi.org/10.1103/PhysRevC.59.3177

}

TY - JOUR

T1 - Polarization transfer and spin response functions in quasielastic [Formula Presented] reactions at 346 MeV

AU - Wakasa, Tomotsugu

AU - Sakai, H.

AU - Hatanaka, K.

AU - Okamura, H.

AU - Otsu, H.

AU - Fujita, S.

AU - Nonaka, T.

AU - Uesaka, T.

AU - Satou, Y.

AU - Ohnishi, T.

AU - Yokoyama, G.

AU - Ishida, S.

AU - Sakamoto, N.

AU - Greenfield, M. B.

AU - Ichimura, M.

AU - Kawahigashi, K.

PY - 1999/1/1

Y1 - 1999/1/1

N2 - A complete set of polarization transfer coefficients has been measured for quasielastic [Formula Presented] reactions on [Formula Presented] [Formula Presented] and [Formula Presented] at a bombarding energy of 346 MeV and a laboratory scattering angle of [Formula Presented] The spin-longitudinal [Formula Presented] and spin-transverse [Formula Presented] response functions are extracted within a framework of a plane-wave impulse approximation with eikonal and optimal factorization approximations. The theoretically expected enhancement of [Formula Presented] is not observed. The observed [Formula Presented] is consistent with the pionic enhanced [Formula Presented] expected by random-phase approximation (RPA) calculations. On the contrary, a large excess of the observed [Formula Presented] is found in comparison with [Formula Presented] of the quasielastic electron scattering as well as of RPA calculations. This excess masks the effect of pionic correlations in [Formula Presented] The theoretical calculations are performed in a distorted-wave impulse approximation with RPA correlations, which indicates that the nuclear absorption effect depends on the spin direction. This spin-direction dependence is responsible in part for the excess of [Formula Presented]

AB - A complete set of polarization transfer coefficients has been measured for quasielastic [Formula Presented] reactions on [Formula Presented] [Formula Presented] and [Formula Presented] at a bombarding energy of 346 MeV and a laboratory scattering angle of [Formula Presented] The spin-longitudinal [Formula Presented] and spin-transverse [Formula Presented] response functions are extracted within a framework of a plane-wave impulse approximation with eikonal and optimal factorization approximations. The theoretically expected enhancement of [Formula Presented] is not observed. The observed [Formula Presented] is consistent with the pionic enhanced [Formula Presented] expected by random-phase approximation (RPA) calculations. On the contrary, a large excess of the observed [Formula Presented] is found in comparison with [Formula Presented] of the quasielastic electron scattering as well as of RPA calculations. This excess masks the effect of pionic correlations in [Formula Presented] The theoretical calculations are performed in a distorted-wave impulse approximation with RPA correlations, which indicates that the nuclear absorption effect depends on the spin direction. This spin-direction dependence is responsible in part for the excess of [Formula Presented]

UR - http://www.scopus.com/inward/record.url?scp=17144436399&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=17144436399&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.59.3177

DO - 10.1103/PhysRevC.59.3177

M3 - Article

VL - 59

SP - 3177

EP - 3195

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 6

ER -