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

Research output: Contribution to journal › Article › peer-review

5 Citations (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.

Original language	English
Article number	393
Pages (from-to)	393-396
Number of pages	4
Journal	European Physical Journal A
Volume	42
Issue number	3
DOIs	https://doi.org/10.1140/epja/i2009-10804-8
Publication status	Published - Dec 2009
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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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. [393]. https://doi.org/10.1140/epja/i2009-10804-8

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, vol. 42, no. 3, 393, pp. 393-396. 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",

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

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pages = "393--396",

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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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JO - European Physical Journal A

JF - European Physical Journal A

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ER -

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

Abstract

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