An upper limit to interstellar 244Pu abundance as deduced from radiochemical search in deep-sea sediment: An account

M. Paul; A. Valenta; I. Ahmad; D. Berkovits; C. Bordeanu; S. Ghelberg; Y. Hashimoto; A. Hershkowitz; S. Jiang; T. Nakanishi; K. Sakamoto

doi:10.1007/s10967-007-0508-3

An upper limit to interstellar ²⁴⁴Pu abundance as deduced from radiochemical search in deep-sea sediment: An account

M. Paul^*, A. Valenta, I. Ahmad, D. Berkovits, C. Bordeanu, S. Ghelberg, Y. Hashimoto, A. Hershkowitz, S. Jiang, T. Nakanishi, K. Sakamoto

^*Corresponding author for this work

Racah Institute of Physics

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Abstract

We report here a search for the "live" ²⁴⁴Pu in 1 kg deep-sea dry sediment collected in 1992 in the North Pacific. After a 546 day alpha-counting of a Pu fraction chemically separated from the alkaline-fused sediment sample at Kanazawa University, AMS analysis was performed at Hebrew University and Weizmann Institute. Only one count of ²⁴⁴Pu with no background ions was detected, indicating no excess over the expected stratospheric man-made fallout. A limit of 0.2 atoms of ²⁴⁴Pu cm ^-2·y^-1 for extra terrestrial deposition was set under reasonable assumptions and it was then concluded from this result and the available data on interstellar medium (ISM) that the abundance of ²⁴⁴Pu in the ISM is less than 2·10^-11 g ²⁴⁴Pu (g·ISM)^-1. Implications of the present result are discussed.

Original language	English
Pages (from-to)	243-245
Number of pages	3
Journal	Journal of Radioanalytical and Nuclear Chemistry
Volume	272
Issue number	2
DOIs	https://doi.org/10.1007/s10967-007-0508-3
State	Published - May 2007

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Paul, M., Valenta, A., Ahmad, I., Berkovits, D., Bordeanu, C., Ghelberg, S., Hashimoto, Y., Hershkowitz, A., Jiang, S., Nakanishi, T., & Sakamoto, K. (2007). An upper limit to interstellar ²⁴⁴Pu abundance as deduced from radiochemical search in deep-sea sediment: An account. Journal of Radioanalytical and Nuclear Chemistry, 272(2), 243-245. https://doi.org/10.1007/s10967-007-0508-3

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abstract = "We report here a search for the {"}live{"} 244Pu in 1 kg deep-sea dry sediment collected in 1992 in the North Pacific. After a 546 day alpha-counting of a Pu fraction chemically separated from the alkaline-fused sediment sample at Kanazawa University, AMS analysis was performed at Hebrew University and Weizmann Institute. Only one count of 244Pu with no background ions was detected, indicating no excess over the expected stratospheric man-made fallout. A limit of 0.2 atoms of 244Pu cm -2·y-1 for extra terrestrial deposition was set under reasonable assumptions and it was then concluded from this result and the available data on interstellar medium (ISM) that the abundance of 244Pu in the ISM is less than 2·10-11 g 244Pu (g·ISM)-1. Implications of the present result are discussed.",

author = "M. Paul and A. Valenta and I. Ahmad and D. Berkovits and C. Bordeanu and S. Ghelberg and Y. Hashimoto and A. Hershkowitz and S. Jiang and T. Nakanishi and K. Sakamoto",

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Paul, M, Valenta, A, Ahmad, I, Berkovits, D, Bordeanu, C, Ghelberg, S, Hashimoto, Y, Hershkowitz, A, Jiang, S, Nakanishi, T & Sakamoto, K 2007, 'An upper limit to interstellar ²⁴⁴Pu abundance as deduced from radiochemical search in deep-sea sediment: An account', Journal of Radioanalytical and Nuclear Chemistry, vol. 272, no. 2, pp. 243-245. https://doi.org/10.1007/s10967-007-0508-3

TY - JOUR

T1 - An upper limit to interstellar 244Pu abundance as deduced from radiochemical search in deep-sea sediment

T2 - An account

AU - Paul, M.

AU - Valenta, A.

AU - Ahmad, I.

AU - Berkovits, D.

AU - Bordeanu, C.

AU - Ghelberg, S.

AU - Hashimoto, Y.

AU - Hershkowitz, A.

AU - Jiang, S.

AU - Nakanishi, T.

AU - Sakamoto, K.

PY - 2007/5

Y1 - 2007/5

N2 - We report here a search for the "live" 244Pu in 1 kg deep-sea dry sediment collected in 1992 in the North Pacific. After a 546 day alpha-counting of a Pu fraction chemically separated from the alkaline-fused sediment sample at Kanazawa University, AMS analysis was performed at Hebrew University and Weizmann Institute. Only one count of 244Pu with no background ions was detected, indicating no excess over the expected stratospheric man-made fallout. A limit of 0.2 atoms of 244Pu cm -2·y-1 for extra terrestrial deposition was set under reasonable assumptions and it was then concluded from this result and the available data on interstellar medium (ISM) that the abundance of 244Pu in the ISM is less than 2·10-11 g 244Pu (g·ISM)-1. Implications of the present result are discussed.

AB - We report here a search for the "live" 244Pu in 1 kg deep-sea dry sediment collected in 1992 in the North Pacific. After a 546 day alpha-counting of a Pu fraction chemically separated from the alkaline-fused sediment sample at Kanazawa University, AMS analysis was performed at Hebrew University and Weizmann Institute. Only one count of 244Pu with no background ions was detected, indicating no excess over the expected stratospheric man-made fallout. A limit of 0.2 atoms of 244Pu cm -2·y-1 for extra terrestrial deposition was set under reasonable assumptions and it was then concluded from this result and the available data on interstellar medium (ISM) that the abundance of 244Pu in the ISM is less than 2·10-11 g 244Pu (g·ISM)-1. Implications of the present result are discussed.

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VL - 272

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JO - Journal of Radioanalytical and Nuclear Chemistry

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ER -

An upper limit to interstellar ²⁴⁴Pu abundance as deduced from radiochemical search in deep-sea sediment: An account

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