Published July 2017 | Version v1
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The first gamma-ray spectroscopic study of sd-shell hypernucleus, Λ19F

  • 1. Dept. of Physics and Astronomy, Seoul National Univ., Seoul (Korea, Republic of)
  • 2. Tohoku Univ., Dept. of Physics, Sendai, Miyagi (Japan)
  • 3. High Energy Accelerator Research Organization (KEK), Inst. of Particle and Nuclear Studies (IPNS), Tsukuba, Ibaraki (Japan)
  • 4. Kyoto Univ., Dept. of Physics, Kyoto (Japan)
  • 5. INFN, Sezione di Torino, Torino (Italy)
  • 6. Japan Atomic Energy Agency (JAEA), Sector of Nuclear Science Research, Advanced Science Research Center (ASRC), Tokai, Ibaraki (Japan)
  • 7. Osaka Univ., Dept. of Physics, Toyonaka, Osaka (Japan)
  • 8. Dept. of Physics, Korea Univ., Seoul (Korea, Republic of)
  • 9. Gifu Univ., Dept. of Education, Gifu (Japan)
  • 10. Osaka Univ., Research Center for Nuclear Physics (RCNP), Ibaraki, Osaka (Japan)
  • 11. Research Center of Nuclear Science and Technology (RCNST) and School of Physics and Nuclear Energy Engineering, Beihang Univ., Beijing (China)

Description

The first γ-ray spectroscopy of sd-shell hypernucleus, Λ19F, is performed in June, 2015 at the J-PARC K1.8 beam line (J-PARC E13). Precise energy levels of Λ19F can be revealed by measured γ-rays in this experiment. Especially, the strength of ΛN spin-spin interaction in sd-shell hypernucleus is obtained through the energy spacing of the ground-state doublet of the hypernucleus. By comparing its strength between the s, p, and sd-shell hypernuclei, a radial dependence of ΛN interaction is investigated. The hypernucleus is produced through the (K, π) reaction with the beam momentum of 1.8 GeV/c. In very preliminary results, we observed two γ-rays, and their energies are 315.8 ± 0.4 and 895.3 ± 0.3 keV where the uncertainties are only statistical. (author)

Availability note (English)

Available from http://dx.doi.org/10.7566/JPSCP.17.012004
Part of:
Proceedings of the 12th international conference on hypernuclear and strange particle physics (HYP2015)

Additional details

Identifiers

Publishing Information

Publisher
Physical Society of Japan
Imprint Place
Tokyo (Japan)
ISBN
978-4-89027-122-1
Imprint Title
Proceedings of the 12th international conference on hypernuclear and strange particle physics (HYP2015)
Imprint Pagination
[623 p.]
Journal Page Range
p. 012004.1-012004.4

Conference

Title
12. international conference on hypernuclear and strange particle physics
Acronym
HYP2015
Dates
7-12 Sep 2015
Place
Sendai, Miyagi (Japan)

Optional Information

Notes
15 refs., 2 figs., 1 tab.