First Determination of the Level Structure of an sd -Shell Hypernucleus, F Λ19

S. B. Yang; J. K. Ahn; Y. Akazawa; K. Aoki; N. Chiga; H. Ekawa; P. Evtoukhovitch; A. Feliciello; M. Fujita; S. Hasegawa; S. Hayakawa; T. Hayakawa; R. Honda; K. Hosomi; S. H. Hwang; N. Ichige; Y. Ichikawa; M. Ikeda; K. Imai; S. Ishimoto; S. Kanatsuki; S. H. Kim; S. Kinbara; K. Kobayashi; T. Koike; J. Y. Lee; K. Miwa; T. J. Moon; T. Nagae; Y. Nakada; M. Nakagawa; Y. Ogura; A. Sakaguchi; H. Sako; Y. Sasaki; S. Sato; K. Shirotori; H. Sugimura; S. Suto; S. Suzuki; T. Takahashi; H. Tamura; K. Tanida; Y. Togawa; Z. Tsamalaidze; M. Ukai; T. F. Wang; T. O. Yamamoto

doi:10.1103/PhysRevLett.120.132505

First Determination of the Level Structure of an sd -Shell Hypernucleus, F Λ19

S. B. Yang, J. K. Ahn, Y. Akazawa, K. Aoki, N. Chiga, H. Ekawa, P. Evtoukhovitch, A. Feliciello, M. Fujita, S. Hasegawa, S. Hayakawa, T. Hayakawa, R. Honda, K. Hosomi, S. H. Hwang, N. Ichige, Y. Ichikawa, M. Ikeda, K. Imai, S. IshimotoS. Kanatsuki, S. H. Kim, S. Kinbara, K. Kobayashi, T. Koike, J. Y. Lee, K. Miwa, T. J. Moon, T. Nagae, Y. Nakada, M. Nakagawa, Y. Ogura, A. Sakaguchi, H. Sako, Y. Sasaki, S. Sato, K. Shirotori, H. Sugimura, S. Suto, S. Suzuki, T. Takahashi, H. Tamura, K. Tanida, Y. Togawa, Z. Tsamalaidze, M. Ukai, T. F. Wang, T. O. Yamamoto

Department of Physics

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Abstract

We report on the first observation of γ rays emitted from an sd-shell hypernucleus, FΛ19. The energy spacing between the ground state doublet, 1/2+ and 3/2+ states, of FΛ19 is determined to be 315.5±0.4(stat)-0.5+0.6(syst) keV by measuring the γ-ray energy of the M1(3/2+→1/2+) transition. In addition, three γ-ray peaks are observed and assigned as E2(5/2+→1/2+), E1(1/2-→1/2+), and E1(1/2-→3/2+) transitions. The excitation energies of the 5/2+ and 1/2- states are determined to be 895.2±0.3(stat)±0.5(syst) and 1265.6±1.2(stat)-0.5+0.7(syst) keV, respectively. It is found that the ground state doublet spacing is well described by theoretical models based on existing s- and p-shell hypernuclear data.

Original language	English
Article number	132505
Journal	Physical review letters
Volume	120
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevLett.120.132505
Publication status	Published - 2018 Mar 29

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.120.132505

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Yang, S. B., Ahn, J. K., Akazawa, Y., Aoki, K., Chiga, N., Ekawa, H., Evtoukhovitch, P., Feliciello, A., Fujita, M., Hasegawa, S., Hayakawa, S., Hayakawa, T., Honda, R., Hosomi, K., Hwang, S. H., Ichige, N., Ichikawa, Y., Ikeda, M., Imai, K., ... Yamamoto, T. O. (2018). First Determination of the Level Structure of an sd -Shell Hypernucleus, F Λ19. Physical review letters, 120(13), [132505]. https://doi.org/10.1103/PhysRevLett.120.132505

Yang, SB, Ahn, JK, Akazawa, Y, Aoki, K, Chiga, N, Ekawa, H, Evtoukhovitch, P, Feliciello, A, Fujita, M, Hasegawa, S, Hayakawa, S, Hayakawa, T, Honda, R, Hosomi, K, Hwang, SH, Ichige, N, Ichikawa, Y, Ikeda, M, Imai, K, Ishimoto, S, Kanatsuki, S, Kim, SH, Kinbara, S, Kobayashi, K, Koike, T, Lee, JY, Miwa, K, Moon, TJ, Nagae, T, Nakada, Y, Nakagawa, M, Ogura, Y, Sakaguchi, A, Sako, H, Sasaki, Y, Sato, S, Shirotori, K, Sugimura, H, Suto, S, Suzuki, S, Takahashi, T, Tamura, H, Tanida, K, Togawa, Y, Tsamalaidze, Z, Ukai, M, Wang, TF & Yamamoto, TO 2018, 'First Determination of the Level Structure of an sd -Shell Hypernucleus, F Λ19', Physical review letters, vol. 120, no. 13, 132505. https://doi.org/10.1103/PhysRevLett.120.132505

@article{8fa098d8cb6841449da48b357759387d,

title = "First Determination of the Level Structure of an sd -Shell Hypernucleus, F Λ19",

abstract = "We report on the first observation of γ rays emitted from an sd-shell hypernucleus, FΛ19. The energy spacing between the ground state doublet, 1/2+ and 3/2+ states, of FΛ19 is determined to be 315.5±0.4(stat)-0.5+0.6(syst) keV by measuring the γ-ray energy of the M1(3/2+→1/2+) transition. In addition, three γ-ray peaks are observed and assigned as E2(5/2+→1/2+), E1(1/2-→1/2+), and E1(1/2-→3/2+) transitions. The excitation energies of the 5/2+ and 1/2- states are determined to be 895.2±0.3(stat)±0.5(syst) and 1265.6±1.2(stat)-0.5+0.7(syst) keV, respectively. It is found that the ground state doublet spacing is well described by theoretical models based on existing s- and p-shell hypernuclear data.",

author = "Yang, {S. B.} and Ahn, {J. K.} and Y. Akazawa and K. Aoki and N. Chiga and H. Ekawa and P. Evtoukhovitch and A. Feliciello and M. Fujita and S. Hasegawa and S. Hayakawa and T. Hayakawa and R. Honda and K. Hosomi and Hwang, {S. H.} and N. Ichige and Y. Ichikawa and M. Ikeda and K. Imai and S. Ishimoto and S. Kanatsuki and Kim, {S. H.} and S. Kinbara and K. Kobayashi and T. Koike and Lee, {J. Y.} and K. Miwa and Moon, {T. J.} and T. Nagae and Y. Nakada and M. Nakagawa and Y. Ogura and A. Sakaguchi and H. Sako and Y. Sasaki and S. Sato and K. Shirotori and H. Sugimura and S. Suto and S. Suzuki and T. Takahashi and H. Tamura and K. Tanida and Y. Togawa and Z. Tsamalaidze and M. Ukai and Wang, {T. F.} and Yamamoto, {T. O.}",

note = "Funding Information: We thank the J-PARC accelerator and facility staff and all the project members who participated in the development of the SKS and Hyperball-J. We also thank A. Umeya, T. Motoba, and D. J. Millener for their theoretical calculations of . This work is partially supported by Tohoku University{\textquoteright}s Focused Research Project, and Grants-in-Aid No. 17070001, No. 21684011, No. 23244043, No. 24105003, No. 24740138, and No. 15H02079 for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) Japan. This research is also supported by World Class University program (Grant No. R32-10155), Basic Research (Young Researcher) (Grant No. 2010-0004752), Center for Korean J-PARC Users (Grants No. K2100200173811B130002410 and No. NRF-2013K1A3A7A06056592), and Brain Korea 21 Plus program through National Research Foundation (NRF) of Korea. Funding Information: This work is partially supported by Tohoku University's Focused Research Project, and Grants-in-Aid No.17070001, No.21684011, No.23244043, No.24105003, No.24740138, and No.15H02079 for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) Japan. This research is also supported by World Class University program (Grant No.R32-10155), Basic Research (Young Researcher) (Grant No.2010-0004752), Center for Korean J-PARC Users (Grants No.K2100200173811B130002410 and No.NRF-2013K1A3A7A06056592), and Brain Korea 21 Plus program through National Research Foundation (NRF) of Korea. Publisher Copyright: {\textcopyright} 2018 American Physical Society.",

year = "2018",

month = mar,

day = "29",

doi = "10.1103/PhysRevLett.120.132505",

language = "English",

volume = "120",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "13",

}

TY - JOUR

T1 - First Determination of the Level Structure of an sd -Shell Hypernucleus, F Λ19

AU - Yang, S. B.

AU - Ahn, J. K.

AU - Akazawa, Y.

AU - Aoki, K.

AU - Chiga, N.

AU - Ekawa, H.

AU - Evtoukhovitch, P.

AU - Feliciello, A.

AU - Fujita, M.

AU - Hasegawa, S.

AU - Hayakawa, S.

AU - Hayakawa, T.

AU - Honda, R.

AU - Hosomi, K.

AU - Hwang, S. H.

AU - Ichige, N.

AU - Ichikawa, Y.

AU - Ikeda, M.

AU - Imai, K.

AU - Ishimoto, S.

AU - Kanatsuki, S.

AU - Kim, S. H.

AU - Kinbara, S.

AU - Kobayashi, K.

AU - Koike, T.

AU - Lee, J. Y.

AU - Miwa, K.

AU - Moon, T. J.

AU - Nagae, T.

AU - Nakada, Y.

AU - Nakagawa, M.

AU - Ogura, Y.

AU - Sakaguchi, A.

AU - Sako, H.

AU - Sasaki, Y.

AU - Sato, S.

AU - Shirotori, K.

AU - Sugimura, H.

AU - Suto, S.

AU - Suzuki, S.

AU - Takahashi, T.

AU - Tamura, H.

AU - Tanida, K.

AU - Togawa, Y.

AU - Tsamalaidze, Z.

AU - Ukai, M.

AU - Wang, T. F.

AU - Yamamoto, T. O.

N1 - Funding Information: We thank the J-PARC accelerator and facility staff and all the project members who participated in the development of the SKS and Hyperball-J. We also thank A. Umeya, T. Motoba, and D. J. Millener for their theoretical calculations of . This work is partially supported by Tohoku University’s Focused Research Project, and Grants-in-Aid No. 17070001, No. 21684011, No. 23244043, No. 24105003, No. 24740138, and No. 15H02079 for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) Japan. This research is also supported by World Class University program (Grant No. R32-10155), Basic Research (Young Researcher) (Grant No. 2010-0004752), Center for Korean J-PARC Users (Grants No. K2100200173811B130002410 and No. NRF-2013K1A3A7A06056592), and Brain Korea 21 Plus program through National Research Foundation (NRF) of Korea. Funding Information: This work is partially supported by Tohoku University's Focused Research Project, and Grants-in-Aid No.17070001, No.21684011, No.23244043, No.24105003, No.24740138, and No.15H02079 for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) Japan. This research is also supported by World Class University program (Grant No.R32-10155), Basic Research (Young Researcher) (Grant No.2010-0004752), Center for Korean J-PARC Users (Grants No.K2100200173811B130002410 and No.NRF-2013K1A3A7A06056592), and Brain Korea 21 Plus program through National Research Foundation (NRF) of Korea. Publisher Copyright: © 2018 American Physical Society.

PY - 2018/3/29

Y1 - 2018/3/29

N2 - We report on the first observation of γ rays emitted from an sd-shell hypernucleus, FΛ19. The energy spacing between the ground state doublet, 1/2+ and 3/2+ states, of FΛ19 is determined to be 315.5±0.4(stat)-0.5+0.6(syst) keV by measuring the γ-ray energy of the M1(3/2+→1/2+) transition. In addition, three γ-ray peaks are observed and assigned as E2(5/2+→1/2+), E1(1/2-→1/2+), and E1(1/2-→3/2+) transitions. The excitation energies of the 5/2+ and 1/2- states are determined to be 895.2±0.3(stat)±0.5(syst) and 1265.6±1.2(stat)-0.5+0.7(syst) keV, respectively. It is found that the ground state doublet spacing is well described by theoretical models based on existing s- and p-shell hypernuclear data.

AB - We report on the first observation of γ rays emitted from an sd-shell hypernucleus, FΛ19. The energy spacing between the ground state doublet, 1/2+ and 3/2+ states, of FΛ19 is determined to be 315.5±0.4(stat)-0.5+0.6(syst) keV by measuring the γ-ray energy of the M1(3/2+→1/2+) transition. In addition, three γ-ray peaks are observed and assigned as E2(5/2+→1/2+), E1(1/2-→1/2+), and E1(1/2-→3/2+) transitions. The excitation energies of the 5/2+ and 1/2- states are determined to be 895.2±0.3(stat)±0.5(syst) and 1265.6±1.2(stat)-0.5+0.7(syst) keV, respectively. It is found that the ground state doublet spacing is well described by theoretical models based on existing s- and p-shell hypernuclear data.

UR - http://www.scopus.com/inward/record.url?scp=85044866337&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.120.132505

DO - 10.1103/PhysRevLett.120.132505

M3 - Article

C2 - 29694189

AN - SCOPUS:85044866337

SN - 0031-9007

VL - 120

JO - Physical Review Letters

JF - Physical Review Letters

IS - 13

M1 - 132505

ER -

First Determination of the Level Structure of an sd -Shell Hypernucleus, F Λ19

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