Observation/confirmation of hindered E2 strength in 18C/16C

H. J. Ong; N. Imai; D. Suzuki; H. Iwasaki; H. Sakurai; T. K. Onishi; M. K. Suzuki; S. Ota; S. Takeuchi; T. Nakao; Y. Togano; Y. Kondo; N. Aoi; H. Baba; S. Bishop; Y. Ichikawa; M. Ishihara; T. Kubo; K. Kurita; T. Motobayashi; T. Nakamura; T. Okumura; Y. Yanagisawa

doi:10.1140/epja/i2009-10804-8

Observation/confirmation of hindered E2 strength in ¹⁸C/¹⁶C

H. J. Ong, N. Imai, D. Suzuki, H. Iwasaki, H. Sakurai, T. K. Onishi, M. K. Suzuki, S. Ota, S. Takeuchi, T. Nakao, Y. Togano, Y. Kondo, N. Aoi, H. Baba, S. Bishop, Y. Ichikawa, M. Ishihara, T. Kubo, K. Kurita, T. MotobayashiT. Nakamura, T. Okumura, Y. Yanagisawa

Publikation: Beitrag in Fachzeitschrift › Artikel › Begutachtung

5 Zitate (Scopus)

Abstract

We have measured the lifetime of the first excited 2⁺ state in ¹⁸C using an upgraded recoil shadow method to determine the electric quadrupole transition. The measured mean lifetime is 18.9±0.9 (stat)±4.4 (syst) ps, corresponding to, or about 1.5 Weisskopf units. The mean lifetime of the first 2⁺ state in ¹⁶C was remeasured to be 18.3±1.4±4.8 ps, about four times shorter than the value reported previously. The discrepancy is explained by incorporating the γ-ray angular distribution obtained in this work into the previous measurement. The observed transition strengths in ^{16, 18}C are hindered compared to the empirical values, indicating that the anomalous E2 strength observed in ¹⁶C persists in ¹⁸C.

Originalsprache	Englisch
Aufsatznummer	393
Seiten (von - bis)	393-396
Seitenumfang	4
Fachzeitschrift	European Physical Journal A
Jahrgang	42
Ausgabenummer	3
DOIs	https://doi.org/10.1140/epja/i2009-10804-8
Publikationsstatus	Veröffentlicht - Dez. 2009
Extern publiziert	Ja

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10.1140/epja/i2009-10804-8

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Ong, H. J., Imai, N., Suzuki, D., Iwasaki, H., Sakurai, H., Onishi, T. K., Suzuki, M. K., Ota, S., Takeuchi, S., Nakao, T., Togano, Y., Kondo, Y., Aoi, N., Baba, H., Bishop, S., Ichikawa, Y., Ishihara, M., Kubo, T., Kurita, K., ... Yanagisawa, Y. (2009). Observation/confirmation of hindered E2 strength in ¹⁸C/¹⁶C. European Physical Journal A, 42(3), 393-396. Artikel 393. https://doi.org/10.1140/epja/i2009-10804-8

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title = "Observation/confirmation of hindered E2 strength in 18C/16C",

abstract = "We have measured the lifetime of the first excited 2+ state in 18C using an upgraded recoil shadow method to determine the electric quadrupole transition. The measured mean lifetime is 18.9±0.9 (stat)±4.4 (syst) ps, corresponding to, or about 1.5 Weisskopf units. The mean lifetime of the first 2+ state in 16C was remeasured to be 18.3±1.4±4.8 ps, about four times shorter than the value reported previously. The discrepancy is explained by incorporating the γ-ray angular distribution obtained in this work into the previous measurement. The observed transition strengths in 16, 18C are hindered compared to the empirical values, indicating that the anomalous E2 strength observed in 16C persists in 18C.",

author = "Ong, {H. J.} and N. Imai and D. Suzuki and H. Iwasaki and H. Sakurai and Onishi, {T. K.} and Suzuki, {M. K.} and S. Ota and S. Takeuchi and T. Nakao and Y. Togano and Y. Kondo and N. Aoi and H. Baba and S. Bishop and Y. Ichikawa and M. Ishihara and T. Kubo and K. Kurita and T. Motobayashi and T. Nakamura and T. Okumura and Y. Yanagisawa",

year = "2009",

month = dec,

doi = "10.1140/epja/i2009-10804-8",

language = "English",

volume = "42",

pages = "393--396",

journal = "European Physical Journal A",

issn = "1434-6001",

number = "3",

}

Ong, HJ, Imai, N, Suzuki, D, Iwasaki, H, Sakurai, H, Onishi, TK, Suzuki, MK, Ota, S, Takeuchi, S, Nakao, T, Togano, Y, Kondo, Y, Aoi, N, Baba, H, Bishop, S, Ichikawa, Y, Ishihara, M, Kubo, T, Kurita, K, Motobayashi, T, Nakamura, T, Okumura, T & Yanagisawa, Y 2009, 'Observation/confirmation of hindered E2 strength in ¹⁸C/¹⁶C', European Physical Journal A, Jg. 42, Nr. 3, 393, S. 393-396. https://doi.org/10.1140/epja/i2009-10804-8

TY - JOUR

T1 - Observation/confirmation of hindered E2 strength in 18C/16C

AU - Ong, H. J.

AU - Imai, N.

AU - Suzuki, D.

AU - Iwasaki, H.

AU - Sakurai, H.

AU - Onishi, T. K.

AU - Suzuki, M. K.

AU - Ota, S.

AU - Takeuchi, S.

AU - Nakao, T.

AU - Togano, Y.

AU - Kondo, Y.

AU - Aoi, N.

AU - Baba, H.

AU - Bishop, S.

AU - Ichikawa, Y.

AU - Ishihara, M.

AU - Kubo, T.

AU - Kurita, K.

AU - Motobayashi, T.

AU - Nakamura, T.

AU - Okumura, T.

AU - Yanagisawa, Y.

PY - 2009/12

Y1 - 2009/12

N2 - We have measured the lifetime of the first excited 2+ state in 18C using an upgraded recoil shadow method to determine the electric quadrupole transition. The measured mean lifetime is 18.9±0.9 (stat)±4.4 (syst) ps, corresponding to, or about 1.5 Weisskopf units. The mean lifetime of the first 2+ state in 16C was remeasured to be 18.3±1.4±4.8 ps, about four times shorter than the value reported previously. The discrepancy is explained by incorporating the γ-ray angular distribution obtained in this work into the previous measurement. The observed transition strengths in 16, 18C are hindered compared to the empirical values, indicating that the anomalous E2 strength observed in 16C persists in 18C.

AB - We have measured the lifetime of the first excited 2+ state in 18C using an upgraded recoil shadow method to determine the electric quadrupole transition. The measured mean lifetime is 18.9±0.9 (stat)±4.4 (syst) ps, corresponding to, or about 1.5 Weisskopf units. The mean lifetime of the first 2+ state in 16C was remeasured to be 18.3±1.4±4.8 ps, about four times shorter than the value reported previously. The discrepancy is explained by incorporating the γ-ray angular distribution obtained in this work into the previous measurement. The observed transition strengths in 16, 18C are hindered compared to the empirical values, indicating that the anomalous E2 strength observed in 16C persists in 18C.

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DO - 10.1140/epja/i2009-10804-8

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SN - 1434-6001

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EP - 396

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