Identification of the new isotope 241Bk

M. Asai; K. Tsukada; S. Ichikawa; M. Sakama; H. Haba; Y. Nagame; I. Nishinaka; K. Akiyama; A. Toyoshima; T. Kaneko; Y. Oura; Y. Kojima; M. Shibata

doi:10.1140/epja/i2002-10112-y

Identification of the new isotope ²⁴¹Bk

M. Asai, K. Tsukada, S. Ichikawa, M. Sakama, H. Haba, Y. Nagame, I. Nishinaka, K. Akiyama, A. Toyoshima, T. Kaneko, Y. Oura, Y. Kojima, M. Shibata

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

9 Citations (Scopus)

Abstract

A new neutron-deficient berkelium isotope ²⁴¹Bk produced in the ²³⁹Pu(⁶Li, 4n) reaction has been identified using a gas-jet coupled on-line isotope separator. Cm K and L X-rays associated with the EC decay of ²⁴¹Bk were observed in the mass-241 fraction, and three γ transitions were attributed to the EC decay of ²⁴¹Bk through X-γ coincidences. The half-life of ²⁴¹Bk was determined to be 4.6±0.4 min which is 1/2-1/4 of that of theoretical predictions. The half-life value and the observed γ transitions can be consistently explained as a consequence of the allowed EC transition of π7/2 ⁺[633] → ν7/2⁺[624].

Original language	English
Pages (from-to)	17-19
Number of pages	3
Journal	European Physical Journal A
Volume	16
Issue number	1
DOIs	https://doi.org/10.1140/epja/i2002-10112-y
Publication status	Published - 2003
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1140/epja/i2002-10112-y

Cite this

@article{369e5b685dc443c48ca9deeb6a9c9e0b,

title = "Identification of the new isotope 241Bk",

abstract = "A new neutron-deficient berkelium isotope 241Bk produced in the 239Pu(6Li, 4n) reaction has been identified using a gas-jet coupled on-line isotope separator. Cm K and L X-rays associated with the EC decay of 241Bk were observed in the mass-241 fraction, and three γ transitions were attributed to the EC decay of 241Bk through X-γ coincidences. The half-life of 241Bk was determined to be 4.6±0.4 min which is 1/2-1/4 of that of theoretical predictions. The half-life value and the observed γ transitions can be consistently explained as a consequence of the allowed EC transition of π7/2 +[633] → ν7/2+[624].",

author = "M. Asai and K. Tsukada and S. Ichikawa and M. Sakama and H. Haba and Y. Nagame and I. Nishinaka and K. Akiyama and A. Toyoshima and T. Kaneko and Y. Oura and Y. Kojima and M. Shibata",

year = "2003",

doi = "10.1140/epja/i2002-10112-y",

language = "English",

volume = "16",

pages = "17--19",

journal = "European Physical Journal A",

issn = "1434-6001",

publisher = "Springer",

number = "1",

}

TY - JOUR

T1 - Identification of the new isotope 241Bk

AU - Asai, M.

AU - Tsukada, K.

AU - Ichikawa, S.

AU - Sakama, M.

AU - Haba, H.

AU - Nagame, Y.

AU - Nishinaka, I.

AU - Akiyama, K.

AU - Toyoshima, A.

AU - Kaneko, T.

AU - Oura, Y.

AU - Kojima, Y.

AU - Shibata, M.

PY - 2003

Y1 - 2003

N2 - A new neutron-deficient berkelium isotope 241Bk produced in the 239Pu(6Li, 4n) reaction has been identified using a gas-jet coupled on-line isotope separator. Cm K and L X-rays associated with the EC decay of 241Bk were observed in the mass-241 fraction, and three γ transitions were attributed to the EC decay of 241Bk through X-γ coincidences. The half-life of 241Bk was determined to be 4.6±0.4 min which is 1/2-1/4 of that of theoretical predictions. The half-life value and the observed γ transitions can be consistently explained as a consequence of the allowed EC transition of π7/2 +[633] → ν7/2+[624].

AB - A new neutron-deficient berkelium isotope 241Bk produced in the 239Pu(6Li, 4n) reaction has been identified using a gas-jet coupled on-line isotope separator. Cm K and L X-rays associated with the EC decay of 241Bk were observed in the mass-241 fraction, and three γ transitions were attributed to the EC decay of 241Bk through X-γ coincidences. The half-life of 241Bk was determined to be 4.6±0.4 min which is 1/2-1/4 of that of theoretical predictions. The half-life value and the observed γ transitions can be consistently explained as a consequence of the allowed EC transition of π7/2 +[633] → ν7/2+[624].

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DO - 10.1140/epja/i2002-10112-y

M3 - Article

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SN - 1434-6001

VL - 16

SP - 17

EP - 19

JO - European Physical Journal A

JF - European Physical Journal A

IS - 1

ER -

Identification of the new isotope ²⁴¹Bk

Abstract

All Science Journal Classification (ASJC) codes

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