Abstract
The electric quadrupole moment Q for the ground state of 17B was determined by the β-NMR method applied to spin-polarized projectile fragments. From the measured quadrupole coupling constant, |eqQ/h(17 in Mg)| = 137.4±4.5 kHz, for 17B in a Mg single crystal stopper the Q moment was deduced as |Q(17B)| = 38.6±1.5 mb. As was the case in the previous 15B result, the obtained Q moment is very close to that for the N = 8 isotope 13B, in sharp contrast to the results of conventional shell-model calculations using constant effective charges. Comparison of the shell-model calculations indicates substantial reduction of the E2 effective charges for isotopes with large (N-Z)/A ratios. The results were well accounted for in terms of (N-Z)/A dependent E2 polarization charges as predicted by Bohr and Mottelson and by incorporating the decoupling feature of loosely bound particles.
| Original language | English |
|---|---|
| Pages (from-to) | 643081-643089 |
| Number of pages | 9 |
| Journal | Physical Review C - Nuclear Physics |
| Volume | 67 |
| Issue number | 6 |
| Publication status | Published - Jun 2003 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
- Nuclear and High Energy Physics
Cite this
Electric quadrupole moment of 17B and anomalous E2 effective charges for neutron-rich nuclei. / Ogawa, H.; Asahi, K.; Sakai, K.; Suzuki, T.; Izumi, H.; Miyoshi, H.; Nagakura, M.; Yogo, K.; Goto, A.; Suga, T.; Honda, T.; Ueno, H.; Watanabe, Y. X.; Yoneda, K.; Yoshimi, Akihiro; Fukuda, N.; Kobayashi, Y.; Yoshida, A.; Kubo, T.; Ishihara, M.; Imai, N.; Aoi, N.; Schmidt-Ott, W. D.; Neyens, G.; Teughels, S.
In: Physical Review C - Nuclear Physics, Vol. 67, No. 6, 06.2003, p. 643081-643089.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electric quadrupole moment of 17B and anomalous E2 effective charges for neutron-rich nuclei
AU - Ogawa, H.
AU - Asahi, K.
AU - Sakai, K.
AU - Suzuki, T.
AU - Izumi, H.
AU - Miyoshi, H.
AU - Nagakura, M.
AU - Yogo, K.
AU - Goto, A.
AU - Suga, T.
AU - Honda, T.
AU - Ueno, H.
AU - Watanabe, Y. X.
AU - Yoneda, K.
AU - Yoshimi, Akihiro
AU - Fukuda, N.
AU - Kobayashi, Y.
AU - Yoshida, A.
AU - Kubo, T.
AU - Ishihara, M.
AU - Imai, N.
AU - Aoi, N.
AU - Schmidt-Ott, W. D.
AU - Neyens, G.
AU - Teughels, S.
PY - 2003/6
Y1 - 2003/6
N2 - The electric quadrupole moment Q for the ground state of 17B was determined by the β-NMR method applied to spin-polarized projectile fragments. From the measured quadrupole coupling constant, |eqQ/h(17 in Mg)| = 137.4±4.5 kHz, for 17B in a Mg single crystal stopper the Q moment was deduced as |Q(17B)| = 38.6±1.5 mb. As was the case in the previous 15B result, the obtained Q moment is very close to that for the N = 8 isotope 13B, in sharp contrast to the results of conventional shell-model calculations using constant effective charges. Comparison of the shell-model calculations indicates substantial reduction of the E2 effective charges for isotopes with large (N-Z)/A ratios. The results were well accounted for in terms of (N-Z)/A dependent E2 polarization charges as predicted by Bohr and Mottelson and by incorporating the decoupling feature of loosely bound particles.
AB - The electric quadrupole moment Q for the ground state of 17B was determined by the β-NMR method applied to spin-polarized projectile fragments. From the measured quadrupole coupling constant, |eqQ/h(17 in Mg)| = 137.4±4.5 kHz, for 17B in a Mg single crystal stopper the Q moment was deduced as |Q(17B)| = 38.6±1.5 mb. As was the case in the previous 15B result, the obtained Q moment is very close to that for the N = 8 isotope 13B, in sharp contrast to the results of conventional shell-model calculations using constant effective charges. Comparison of the shell-model calculations indicates substantial reduction of the E2 effective charges for isotopes with large (N-Z)/A ratios. The results were well accounted for in terms of (N-Z)/A dependent E2 polarization charges as predicted by Bohr and Mottelson and by incorporating the decoupling feature of loosely bound particles.
UR - http://www.scopus.com/inward/record.url?scp=4444257604&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=4444257604&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:4444257604
VL - 67
SP - 643081
EP - 643089
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
SN - 0556-2813
IS - 6
ER -