Mesonic effects deduced from good-resolution (He-3, t) reaction in comparison with inelastic scatterings

Y Fujita; H Akimune; I Daito; M Fujiwara; M N Harakeh; T Inomata; J Janecke; K Katori; C Luttge; S Nakayama; P von Neumann-Cosel; A Richter; A Tamii; M Tanaka; H Ueno; M Yosoi

doi:10.1016/S0168-9002(97)00865-6

Mesonic effects deduced from good-resolution (He-3, t) reaction in comparison with inelastic scatterings

Y Fujita^*
, H Akimune
, I Daito
, M Fujiwara
, M N Harakeh
, T Inomata
, J Janecke
, K Katori
, C Luttge
, S Nakayama
, P von Neumann-Cosel
, A Richter
, A Tamii
, M Tanaka
, H Ueno
, M Yosoi

^*Corresponding author for this work

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

5 Citations (Scopus)

Abstract

Gamow-Teller (GT) states excited by a charge-exchange reaction on N = Z nuclei with ground-state isospin T = 0 have isospin T = 1, while M1 states excited by inelastic scattering of electrons or protons can have either T = 0 or T = 1. The latter are the isobaric analog states of the GT states. By comparing the GT states observed in the good-resolution (He-3, t) reaction at 150 MeV/u with the M1 states observed in inelastic proton reactions, the isospin of each 1(+) state in Si-28 was determined. Furthermore, by comparing results from electron inelastic scattering induced by electro-magnetic M1 operator, different response of nucleus depending on different interaction is investigated, Based on these comparisons among different probes, we discuss (1) the contribution of the "Delta-h excitation" mechanism in the quenching of magnetic excitations; (2) the effects of meson exchange currents; and (3) the orbital contribution in the M1 operator.

Original language	English
Pages (from-to)	371-377
Number of pages	7
Journal	Nuclear instruments & methods in physics research section a-Accelerators spectrometers detectors and associated equipment
Volume	402
Issue number	2-3
DOIs	https://doi.org/10.1016/S0168-9002(97)00865-6
Publication status	Published - 11-Jan-1998
Event	7th RCNP International Workshop on Polarized 3He Beams and Gas Targets and Their Application (HELION 97) - , Japan Duration: 20-Jan-1997 → 24-Jan-1997

Keywords

good-resolution (He-3, t) reaction
isospin structure
quenching of Gamow-Teller strengths
meson exchange current
orbital current
TELLER MATRIX-ELEMENTS
SD-SHELL NUCLEI
INTERMEDIATE ENERGIES
ISOVECTOR
M1
EXCITATIONS
STRENGTH
SPIN
SI-28

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Mesonic effects deduced from good-resolution (He-3, t) reaction
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Fujita, Y., Akimune, H., Daito, I., Fujiwara, M., Harakeh, M. N., Inomata, T., Janecke, J., Katori, K., Luttge, C., Nakayama, S., von Neumann-Cosel, P., Richter, A., Tamii, A., Tanaka, M., Ueno, H., & Yosoi, M. (1998). Mesonic effects deduced from good-resolution (He-3, t) reaction in comparison with inelastic scatterings. Nuclear instruments & methods in physics research section a-Accelerators spectrometers detectors and associated equipment, 402(2-3), 371-377. https://doi.org/10.1016/S0168-9002(97)00865-6

@article{2c400febc4ec424cad28e270731cab0f,

title = "Mesonic effects deduced from good-resolution (He-3, t) reaction in comparison with inelastic scatterings",

abstract = "Gamow-Teller (GT) states excited by a charge-exchange reaction on N = Z nuclei with ground-state isospin T = 0 have isospin T = 1, while M1 states excited by inelastic scattering of electrons or protons can have either T = 0 or T = 1. The latter are the isobaric analog states of the GT states. By comparing the GT states observed in the good-resolution (He-3, t) reaction at 150 MeV/u with the M1 states observed in inelastic proton reactions, the isospin of each 1(+) state in Si-28 was determined. Furthermore, by comparing results from electron inelastic scattering induced by electro-magnetic M1 operator, different response of nucleus depending on different interaction is investigated, Based on these comparisons among different probes, we discuss (1) the contribution of the {"}Delta-h excitation{"} mechanism in the quenching of magnetic excitations; (2) the effects of meson exchange currents; and (3) the orbital contribution in the M1 operator.",

keywords = "good-resolution (He-3, t) reaction, isospin structure, quenching of Gamow-Teller strengths, meson exchange current, orbital current, TELLER MATRIX-ELEMENTS, SD-SHELL NUCLEI, INTERMEDIATE ENERGIES, ISOVECTOR, M1, EXCITATIONS, STRENGTH, SPIN, SI-28",

author = "Y Fujita and H Akimune and I Daito and M Fujiwara and Harakeh, \{M N\} and T Inomata and J Janecke and K Katori and C Luttge and S Nakayama and \{von Neumann-Cosel\}, P and A Richter and A Tamii and M Tanaka and H Ueno and M Yosoi",

year = "1998",

month = jan,

day = "11",

doi = "10.1016/S0168-9002(97)00865-6",

language = "English",

volume = "402",

pages = "371--377",

journal = "Nuclear instruments \& methods in physics research section a-Accelerators spectrometers detectors and associated equipment",

issn = "0168-9002",

publisher = "ELSEVIER SCIENCE BV",

number = "2-3",

note = "7th RCNP International Workshop on Polarized 3He Beams and Gas Targets and Their Application (HELION 97) ; Conference date: 20-01-1997 Through 24-01-1997",

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Fujita, Y, Akimune, H, Daito, I, Fujiwara, M, Harakeh, MN, Inomata, T, Janecke, J, Katori, K, Luttge, C, Nakayama, S, von Neumann-Cosel, P, Richter, A, Tamii, A, Tanaka, M, Ueno, H & Yosoi, M 1998, 'Mesonic effects deduced from good-resolution (He-3, t) reaction in comparison with inelastic scatterings', Nuclear instruments & methods in physics research section a-Accelerators spectrometers detectors and associated equipment, vol. 402, no. 2-3, pp. 371-377. https://doi.org/10.1016/S0168-9002(97)00865-6

Mesonic effects deduced from good-resolution (He-3, t) reaction in comparison with inelastic scatterings. / Fujita, Y; Akimune, H; Daito, I et al.
In: Nuclear instruments & methods in physics research section a-Accelerators spectrometers detectors and associated equipment, Vol. 402, No. 2-3, 11.01.1998, p. 371-377.

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

TY - JOUR

T1 - Mesonic effects deduced from good-resolution (He-3, t) reaction in comparison with inelastic scatterings

AU - Fujita, Y

AU - Akimune, H

AU - Daito, I

AU - Fujiwara, M

AU - Harakeh, M N

AU - Inomata, T

AU - Janecke, J

AU - Katori, K

AU - Luttge, C

AU - Nakayama, S

AU - von Neumann-Cosel, P

AU - Richter, A

AU - Tamii, A

AU - Tanaka, M

AU - Ueno, H

AU - Yosoi, M

PY - 1998/1/11

Y1 - 1998/1/11

N2 - Gamow-Teller (GT) states excited by a charge-exchange reaction on N = Z nuclei with ground-state isospin T = 0 have isospin T = 1, while M1 states excited by inelastic scattering of electrons or protons can have either T = 0 or T = 1. The latter are the isobaric analog states of the GT states. By comparing the GT states observed in the good-resolution (He-3, t) reaction at 150 MeV/u with the M1 states observed in inelastic proton reactions, the isospin of each 1(+) state in Si-28 was determined. Furthermore, by comparing results from electron inelastic scattering induced by electro-magnetic M1 operator, different response of nucleus depending on different interaction is investigated, Based on these comparisons among different probes, we discuss (1) the contribution of the "Delta-h excitation" mechanism in the quenching of magnetic excitations; (2) the effects of meson exchange currents; and (3) the orbital contribution in the M1 operator.

AB - Gamow-Teller (GT) states excited by a charge-exchange reaction on N = Z nuclei with ground-state isospin T = 0 have isospin T = 1, while M1 states excited by inelastic scattering of electrons or protons can have either T = 0 or T = 1. The latter are the isobaric analog states of the GT states. By comparing the GT states observed in the good-resolution (He-3, t) reaction at 150 MeV/u with the M1 states observed in inelastic proton reactions, the isospin of each 1(+) state in Si-28 was determined. Furthermore, by comparing results from electron inelastic scattering induced by electro-magnetic M1 operator, different response of nucleus depending on different interaction is investigated, Based on these comparisons among different probes, we discuss (1) the contribution of the "Delta-h excitation" mechanism in the quenching of magnetic excitations; (2) the effects of meson exchange currents; and (3) the orbital contribution in the M1 operator.

KW - good-resolution (He-3, t) reaction

KW - isospin structure

KW - quenching of Gamow-Teller strengths

KW - meson exchange current

KW - orbital current

KW - TELLER MATRIX-ELEMENTS

KW - SD-SHELL NUCLEI

KW - INTERMEDIATE ENERGIES

KW - ISOVECTOR

KW - M1

KW - EXCITATIONS

KW - STRENGTH

KW - SPIN

KW - SI-28

U2 - 10.1016/S0168-9002(97)00865-6

DO - 10.1016/S0168-9002(97)00865-6

M3 - Article

SN - 0168-9002

VL - 402

SP - 371

EP - 377

JO - Nuclear instruments & methods in physics research section a-Accelerators spectrometers detectors and associated equipment

JF - Nuclear instruments & methods in physics research section a-Accelerators spectrometers detectors and associated equipment

IS - 2-3

T2 - 7th RCNP International Workshop on Polarized 3He Beams and Gas Targets and Their Application (HELION 97)

Y2 - 20 January 1997 through 24 January 1997

ER -

Mesonic effects deduced from good-resolution (He-3, t) reaction in comparison with inelastic scatterings

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Keywords

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