Speaker
Dr
Masanori Dozono
(Center for Nuclear Study, University of Tokyo)
Description
The spin-dipole (SD) $0^-$ excitation characterized
by $\Delta L=1$, $\Delta S=1$, and $\Delta J^{\pi}=0^-$,
attracts recent theoretical attention
due to its strong relevances to the tensor correlations in nuclei.
For example,
self-consistent HF+RPA calculations in Ref. [1]
predict that the tensor correlations produce
a strong hardening (shifting toward higher excitation energy) effect
on the $0^-$ resonance.
It is also predicted that the effect is sensitive to
the magnitude of the tensor strength.
Thus experimental data of the SD $0^-$ distribution
enable us to quantitatively examine the tensor correlation effects.
Despite this importance,
experimental information on $0^-$ states is limited
because of the lack of the experimental tools
that are suitable for the $0^-$ studies.
We propose a new probe,
the parity-transfer $(^{16}{\rm O},^{16}{\rm F}(0^-,{\rm g.s.}))$ reaction,
for the $0^-$ studies [2].
The parity-transfer reaction uses $0^+ \rightarrow 0^-$ transition
in the projectile to probe $0^-$ states in a target nucleus.
This reaction has a unique selectivity to
unnatural-parity states,
which is an advantage over the other reactions used so far.
The first experiment for a ${}^{12}{\rm C}$ target
was performed at the RIKEN RI Beam Factory
by using the SHARAQ spectrometer [3].
In this presentation,
we will report the details of the experiment and the results.
[1] H. Sagawa, G. Coló, Prog. Part. Nucl. Phys., 76 (2014) 76
[2] M. Dozono et al., RIKEN Accel. Prog. Rep., 45 (2012) 10
[3] T. Uesaka et al., Prog. Theor. Exp. Phys., 2012 (2012) 03C007
Primary author
Dr
Masanori Dozono
(Center for Nuclear Study, University of Tokyo)
Co-authors
Ms
Ayaka Ohkura
(Department of Physics, Kyushu University)
Mr
CheongSoo Lee
(Center for Nuclear Study, University of Tokyo)
Prof.
Hideyuki Sakai
(RIKEN Nishina Center)
Mr
Hiromi Tabata
(Department of Physics, Kyushu University)
Dr
Hiroshi Suzuki
(RIKEN Nishina Center)
Mr
Hiroshi Tokieda
(Center for Nuclear Study, University of Tokyo)
Mr
Hiroyuki Miya
(Center for Nuclear Study, University of Tokyo)
Prof.
Hiroyuki Sagawa
(RIKEN Nishina Center)
Dr
Hiroyuki Takeda
(RIKEN Nishina Center)
Mr
Jumpei Yasuda
(Department of Physics, Kyushu University)
Dr
Juzo Zenihiro
(RIKEN Nishina Center)
Mr
Kazuma Kobayashi
(Department of Physics, Rikkyo University)
Dr
Keiichi Kisamori
(RIKEN Nishina Center)
Dr
Kentaro Yako
(Center for Nuclear Study, University of Tokyo)
Dr
Koichi Yoshida
(RIKEN Nishina Center)
Dr
Kunihiro Fujita
(Department of Physics, Kyushu University)
Dr
Laszlo Stuhl
(RIKEN Nishina Center)
Dr
Masahumi Matsushita
(Center for Nuclear Study, University of Tokyo)
Dr
Masaki Sasano
(RIKEN Nishina Center)
Mr
Motoki Kobayashi
(Center for Nuclear Study, University of Tokyo)
Mr
Motonobu Takaki
(Center for Nuclear Study, University of Tokyo)
Prof.
Munetake Ichimura
(RIKEN Nishina Center)
Dr
Naohito Inabe
(RIKEN Nishina Center)
Dr
Naoki Fukuda
(RIKEN Nishina Center)
Dr
Rin Yokoyama
(Center for Nuclear Study, University of Tokyo)
Dr
Satoshi Sakaguchi
(Department of Physics, Kyushu University)
Dr
Shinichiro Michimasa
(Center for Nuclear Study, University of Tokyo)
Dr
Shinsuke Ota
(Center for Nuclear Study, University of Tokyo)
Mr
Shoichiro Kawase
(Department of Advanced Energy Engineering Science, Kyushu University)
Prof.
Susumu Shimoura
(Center for Nuclear Study, University of Tokyo)
Prof.
Tomohiro Uesaka
(RIKEN Nishina Center)
Dr
Tomotsugu Wakasa
(Department of Physics, Kyushu University)
Prof.
Toshiyuki Kubo
(RIKEN Nishina Center)
Dr
Yoshiyuki Yanagisawa
(RIKEN Nishina Center)
Mr
Yu Kiyokawa
(Center for Nuclear Study, University of Tokyo)
Dr
Yuki Kubota
(Center for Nuclear Study)
Mr
Yusuke Shindo
(Department of Physics, Kyushu University)
