Physics
Scientific paper
Jun 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..570..218s&link_type=abstract
The fourteenth international spin physics symposium, SPIN2000. AIP Conference Proceedings, Volume 570, pp. 218-227 (2001).
Physics
Charge-Exchange Reactions, A<=5, 6<=A<=19, 39<=A<=58, Polarization Phenomena In Reactions
Scientific paper
High quality (p, n) data obtained by NTOF+NPOL2 facility at RCNP were presented. From the measurement of 90Zr(p,n) reaction at 295 MeV, the quenching value for the Gamow-Teller transition in terms of the Ikeda's sum rule of Sβ--Sβ+=3(N-Z) is derived as 0.90+/-0.05. By using this quenching value, the Landau-Migdal parameters representing short-range correlation in isospin-spin interactions are deduced as (gNN',gNΔ')=(0.6,0.2). This small gNΔ' value favors the pion condensation. The complete set of the polarization transfer coefficients, DLL', DSS', DNN', DLS' and DSL', for the (p, n) quasi-elastic scattering has been measured at 350 MeV. The spin-longitudinal cross section IDq(~RL) and the spin-transverse cross section IDp(~RT) are deduced. IDq is found to be consistent with the DWIA+RPA calculation with (gNN',gNΔ')=(0.6,0.3). This result supports strongly the existence of the pionic enhancement in nuclei. .
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