Sharaq Spectrometer: High-resolution Spectroscopy Using Exotic Beams And Reactions

Michimasa, S.; Ota, S.; Dozono, M.; Takaki, M.; Kisamori, K.; Miya, Hiroyuki; Kobayashi, Mariko; Kiyokawa, Yasushi; Baba, H.; Fukuda, N.; Inabe, N.; Kawase, S.; Kubo, T.; Kubota, Yuki; Lee, Cheong Soo; Matsushita, M.; Saya, Hideyuki; Tokieda, H.; Uesaka, Tomohiro; Yako, K.; Yanagisawa, Y.; Yokoyama, R.; Yoshida, Kôichi; Shimoura, S.

doi:10.22323/1.281.0106

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…TOF methods are currently being accompanied by development of high-rigidity spectrometers, some of which are already in use, such as the SHARAQ spectrometer. 98,174 Others are currently being planned, such as the FRIB HRS. 81 These are outfitted with beamline detectors for high-precision determination of particle rigidity, which is necessary for precise event-by-event measurements as well as separation of charge states.…”

Section: Discussionmentioning

confidence: 99%

Nuclear mass measurements with radioactive ion beams

Famiano

2019

Int. J. Mod. Phys. E

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Received X XXXXX XXXX Revised XX XXXXX XXXX Nuclear masses are the most fundamental of all nuclear properties, yet they can provide a wealth of knowledge, including information on astrophysical sites, constraints on existing theory, and fundamental symmetries. In nearly all applications, it is necessary to measure nuclear masses with very high precision. As mass measurements push to more short-lived and more massive nuclei, the practical constraints on mass measurement techniques become more exacting. Various techniques used to measure nuclear masses, including their advantages and disadvantages are described. Descriptions of some of the world facilities at which the nuclear mass measurements are performed are given, and brief summaries of planned facilities are presented. Future directions are mentioned, and conclusions are presented which provide a possible outlook and emphasis on upcoming plans for nuclear mass measurements at existing facilities, those under construction, and those being planned.

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Section: Discussionmentioning

confidence: 99%

Nuclear mass measurements with radioactive ion beams

Famiano

2019

Int. J. Mod. Phys. E

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“…The high resolution of the SHARAQ detector allows for a fine measure of rigidity. Recent measurements of the masses of 55,56 Ca have resulted in mass resolutions of σ ∼150 keV and 234 keV respectively [181].…”

Section: Spegmentioning

confidence: 99%

Current Status of r-Process Nucleosynthesis

Kajino,

Aoki,

Balantekin

et al. 2019

Preprint

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The rapid neutron capture process (r-process) is believed to be responsible for about half of the production of the elements heavier than iron and contributes to abundances of some lighter nuclides as well. A universal pattern of r-process element abundances is observed in some metal-poor stars of the Galactic halo. This suggests that a well-regulated combination of astrophysical conditions and nuclear physics conspires to produce such a universal abundance pattern. The search for the astrophysical site for r-process nucleosynthesis has stimulated interdisciplinary research for more than six decades. There is currently much enthusiasm surrounding evidence for r-process nucleosynthesis in binary neutron star mergers in the multiwavelength follow-up observations of kilonova/gravitational-wave GRB170807A/GW170817. Nevertheless, there remain questions as to the contribution over the history of the Galaxy to the current solar-system r-process abundances from other sites such as neutrino-driven winds or magnetohydrodynamical ejection of material from core-collapse supernovae. In this review we highlight some current issues surrounding the nuclear physics input, astronomical observations, galactic chemical evolution, and theoretical simulations of r process astrophysical environments with goal of outlining a path toward resolving the remaining mysteries of the r-process.

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Magic Nature of Neutrons in Ca54 : First Mass Measurements of Ca55
Michimasa¹,
Kobayashi²,
Kiyokawa³
et al. 2018
Phys. Rev. Lett.
114
20
101
1
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We perform the first direct mass measurements of neutron-rich calcium isotopes beyond neutron number 34 at the RIKEN Radioactive Isotope Beam Factory by using the time-of-flight magnetic-rigidity technique. The atomic mass excesses of ^{55-57}Ca are determined for the first time to be -18650(160), -13510(250), and -7370(990) keV, respectively. We examine the emergence of neutron magicity at N=34 based on the new atomic masses. The new masses provide experimental evidence for the appearance of a sizable energy gap between the neutron 2p_{1/2} and 1f_{5/2} orbitals in ^{54}Ca, comparable to the gap between the neutron 2p_{3/2} and 2p_{1/2} orbitals in ^{52}Ca. For the ^{56}Ca nucleus, an open-shell property in neutrons is suggested.

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Sharaq Spectrometer: High-resolution Spectroscopy Using Exotic Beams And Reactions

Cited by 4 publications

References 8 publications

Nuclear mass measurements with radioactive ion beams

Nuclear mass measurements with radioactive ion beams

Current Status of r-Process Nucleosynthesis

Magic Nature of Neutrons in Ca54 : First Mass Measurements of Ca55
Michimasa¹,
Kobayashi²,
Kiyokawa³
et al. 2018
Phys. Rev. Lett.
114
20
101
1
View full text Add to dashboard Cite

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Sharaq Spectrometer: High-resolution Spectroscopy Using Exotic Beams And Reactions

Cited by 4 publications

References 8 publications

Nuclear mass measurements with radioactive ion beams

Nuclear mass measurements with radioactive ion beams

Current Status of r-Process Nucleosynthesis

Magic Nature of Neutrons in Ca54 : First Mass Measurements of Ca55Michimasa1, Kobayashi2, Kiyokawa3 et al. 2018Phys. Rev. Lett.114201011View full textAdd to dashboardCite

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Magic Nature of Neutrons in Ca54 : First Mass Measurements of Ca55
Michimasa¹,
Kobayashi²,
Kiyokawa³
et al. 2018
Phys. Rev. Lett.
114
20
101
1
View full text Add to dashboard Cite