The degree of freedom of spin in quantum systems serves as an unparalleled laboratory where intriguing quantum physical properties can be observed, and the ability to control spin is a powerful tool ...in physics research. We propose a method for controlling spin in a system of rare isotopes which takes advantage of the mechanism of the projectile fragmentation reaction combined with the momentum-dispersion matching technique. The present method was veried in an experiment at the RIKEN RI Beam Factory, in which a degree of alignment of 8% was achieved for the spin of a rare isotope 32Al. The gure of merit for the present method was found to be greater than that of the conventional method by a factor of more than 50.
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IJS, IZUM, KILJ, NUK, PILJ, PNG, SAZU, UL, UM, UPUK
In December 2015, Mitsuo Sakai, Professor Emeritus at the University of Tokyo (UT), passed away at the age of 94. He spent most of his career at the Institute for Nuclear Study (INS), UT, where he ...took a pivotal role in establishing a foundation for the modern nuclear physics research in Japan.
Spin-aligned RI beams via two-step fragmentation reactions Ichikawa, Y.; Ueno, H.; Ishii, Y. ...
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms,
12/2013, Volume:
317
Journal Article
Peer reviewed
Open access
A method to produce spin-aligned rare isotope (RI) beams has been developed, where a scheme of two-step projectile fragmentation to produce the RI of interest with high spin alignment and a technique ...of momentum-dispersion matching are combined. Effectiveness of the present method was demonstrated in an experiment at the RIKEN RIBF, where an RI beam of 32Al with spin alignment of 8(1)% was successfully produced from a primary beam of 48Ca, via an intermediate RI of 33Al. Figure of merit of the present method was found to be more than 50 times greater than that of the conventional method employing single-step projectile fragmentation.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
Excited states in 12Be and 14Be were studied by using an exotic beam of 14Be at 75 A MeV. A new excited state in 12Be was observed at 11.8 MeV. The angular-correlation analysis showed that the spin ...for the new level is tentatively assigned to be 0. According to the energy-spin systematics, the observed state may be a member of the rotational band of the 6He-6He cluster structure. Three excited states in 14Be were also found at 10.8 MeV, 11.6 MeV, and 15.5 MeV.
To produce a radioactive-isotope (RI) beam with high spin alignment, we have developed a novel method, the two-step projectile-fragmentation (PF) method, that employs momentum-dispersion matching. An ...on-line experiment to produce 32A1 from 48Ca via 33A1 was performed at RIKEN RI Beam Factory. In the experiment, we succeeded in producing approximately 8% spin alignment in an RI beam of 32A1. In this paper, we focus on evaluating the magnitude of spin alignment realized in one-nucleon removal from 33A1.
24pZF-6 Breakup reaction of ^8He Nannichi, Takashi; Nakamura, Takashi; Satou, Yoshiteru ...
Meeting Abstracts of the Physical Society of Japan,
2008/02/29
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