TY - JOUR
T1 - Spectroscopy of positive parity states in Mg26 and Al26 via the (3He) and (,t) reactions
AU - Yasue, M.
AU - Ogawa, K.
AU - Niizeki, T.
AU - Takamatsu, J.
AU - Ohura, M.
AU - Terakawa, A.
AU - Nakagawa, T.
AU - Hasegawa, T.
AU - Ohnuma, H.
AU - Toyokawa, H.
AU - Hamada, S.
N1 - Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 1990
Y1 - 1990
N2 - The (,3He) and (,t) reactions on Mg25 were measured at E=50 MeV. Cross sections obtained for 57 positive parity states in Mg26 and Al26 were analyzed within the framework of the exact-finite-range distorted-wave Born approximation and compared to the full s-d shell model predictions. Reasonable agreement between the experimental strengths and the theory was obtained for the low lying states. Deviations of factors of 2 or more were found for some high lying 2+, 3+, and 4+ states in Al26 and especially for the 11+ state in Mg26. The spectroscopic factors for the transitions to the analog states in Mg26 and Al26 were compared between these reactions. The same strength was obtained for the 61-, T=1 state in Mg26 and Al26, whereas an enhancement of about 30% was observed for the 01+ and 31+, T=1 states in Al26. Further, 1+ states in Mg26 proposed around Ex=10 MeV through the (p,p) reaction were also observed in the Mg25(,3He) reaction without the special enhancement for the 10.6 MeV 1+ state seen in the (p,p) reaction. The total observed strengths for neutron stripping to the positive-parity states in the region of Ex=011 MeV almost attained the limit of the pure j-j coupling scheme. Those for the proton stripping were 70% of the limit in the region of Ex=08 MeV.
AB - The (,3He) and (,t) reactions on Mg25 were measured at E=50 MeV. Cross sections obtained for 57 positive parity states in Mg26 and Al26 were analyzed within the framework of the exact-finite-range distorted-wave Born approximation and compared to the full s-d shell model predictions. Reasonable agreement between the experimental strengths and the theory was obtained for the low lying states. Deviations of factors of 2 or more were found for some high lying 2+, 3+, and 4+ states in Al26 and especially for the 11+ state in Mg26. The spectroscopic factors for the transitions to the analog states in Mg26 and Al26 were compared between these reactions. The same strength was obtained for the 61-, T=1 state in Mg26 and Al26, whereas an enhancement of about 30% was observed for the 01+ and 31+, T=1 states in Al26. Further, 1+ states in Mg26 proposed around Ex=10 MeV through the (p,p) reaction were also observed in the Mg25(,3He) reaction without the special enhancement for the 10.6 MeV 1+ state seen in the (p,p) reaction. The total observed strengths for neutron stripping to the positive-parity states in the region of Ex=011 MeV almost attained the limit of the pure j-j coupling scheme. Those for the proton stripping were 70% of the limit in the region of Ex=08 MeV.
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U2 - 10.1103/PhysRevC.42.1279
DO - 10.1103/PhysRevC.42.1279
M3 - Article
AN - SCOPUS:4244042928
VL - 42
SP - 1279
EP - 1296
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
SN - 0556-2813
IS - 4
ER -