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Title: Lifetime determination of excited states in 106Cd

Abstract

Two separate experiments using the Differential Decay Curve Method have been performed to extract mean lifetimes of excited states in 106Cd. The medium-spin states of interest were populated by the 98Mo( 12C, 4n) 106Cd reaction performed at the Wright Nuclear Structure Lab., Yale University. From this experiment, two isomeric state mean lifetimes have been deduced. The low-lying states were populated by the 96Mo( 13C, 3n) 106Cd reaction performed at the Institut für Kernphysik, Universität zu Köln. The mean lifetime of the I π = 2 1 + state was deduced, tentatively, as 16.4(9) ps. This value differs from the previously accepted literature value from Coulomb excitation of 10.43(9) ps.

Authors:
 [1];  [2];  [2];  [1];  [3];  [2];  [4];  [2];  [2];  [5];  [6];  [7];  [6];  [4];  [8];  [2];  [1];  [9];  [2];  [10] more »;  [11];  [4];  [10];  [4];  [12];  [13];  [3];  [4];  [14];  [4];  [4];  [2] « less
  1. Univ. of Surrey, Guildford (United Kingdom)
  2. Univ. zu Koln (Germany)
  3. Univ. of Surrey, Guildford (United Kingdom); KTH Royal Inst. of Technology, Stockholm (Sweden)
  4. Yale Univ., New Haven, CT (United States). Wright Nuclear Structure Lab.
  5. Yale Univ., New Haven, CT (United States). Wright Nuclear Structure Lab.; Inst. National de Fizica si Inginerie Nucleara, Bucurest (Romania)
  6. Yale Univ., New Haven, CT (United States). Wright Nuclear Structure Lab.; Istanbul Univ. (Turkey)
  7. Univ. zu Koln (Germany); Univ. Gent (Belgium)
  8. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  9. Yale Univ., New Haven, CT (United States). Wright Nuclear Structure Lab.; Clark Univ., Worcester, MA (United States)
  10. Univ. of Paisley, Paisley (United Kingdom). Institute of Physical Research
  11. Istanbul Univ., Istanbul (Turkey). Dept. of Physics
  12. State Univ. of New York (SUNY), Stony Brook, NY (United States). Dept. of Physics and Astronomy
  13. Univ. de Sao Paulo (Brazil). Instituto de Fisica
  14. Daresbury Lab. Warrington (United Kingdom). CCLRC
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1407054
Grant/Contract Number:
AC02-05CH11231
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Acta Physica Polonica. Series B
Additional Journal Information:
Journal Volume: 38; Journal ID: ISSN 0587-4254
Publisher:
Jagiellonian University
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS

Citation Formats

Ashley, S. F., Linnemann, A., Jolie, J., Regan, P. H., Andgren, K., Dewald, A., McCutchan, E. A., Melon, B., Möller, O., Zamfir, N. V., Amon, L., Boelaert, N., Cakirli, R. B., Casten, R. F., Clark, R. M., Fransen, C., Gelletly, W., Gürdal, G., Heidemann, M., Keyes, K. L., Erduran, M. -N., Meyer, D. A., Papenberg, A., Plettner, C., Rainovski, G., Ribas, R. V., Thomas, N. J., Vinson, J., Warner, D. D., Werner, V., Williams, E., and Zell, K. O.. Lifetime determination of excited states in 106Cd. United States: N. p., 2007. Web.
Ashley, S. F., Linnemann, A., Jolie, J., Regan, P. H., Andgren, K., Dewald, A., McCutchan, E. A., Melon, B., Möller, O., Zamfir, N. V., Amon, L., Boelaert, N., Cakirli, R. B., Casten, R. F., Clark, R. M., Fransen, C., Gelletly, W., Gürdal, G., Heidemann, M., Keyes, K. L., Erduran, M. -N., Meyer, D. A., Papenberg, A., Plettner, C., Rainovski, G., Ribas, R. V., Thomas, N. J., Vinson, J., Warner, D. D., Werner, V., Williams, E., & Zell, K. O.. Lifetime determination of excited states in 106Cd. United States.
Ashley, S. F., Linnemann, A., Jolie, J., Regan, P. H., Andgren, K., Dewald, A., McCutchan, E. A., Melon, B., Möller, O., Zamfir, N. V., Amon, L., Boelaert, N., Cakirli, R. B., Casten, R. F., Clark, R. M., Fransen, C., Gelletly, W., Gürdal, G., Heidemann, M., Keyes, K. L., Erduran, M. -N., Meyer, D. A., Papenberg, A., Plettner, C., Rainovski, G., Ribas, R. V., Thomas, N. J., Vinson, J., Warner, D. D., Werner, V., Williams, E., and Zell, K. O.. Sun . "Lifetime determination of excited states in 106Cd". United States. doi:. https://www.osti.gov/servlets/purl/1407054.
@article{osti_1407054,
title = {Lifetime determination of excited states in 106Cd},
author = {Ashley, S. F. and Linnemann, A. and Jolie, J. and Regan, P. H. and Andgren, K. and Dewald, A. and McCutchan, E. A. and Melon, B. and Möller, O. and Zamfir, N. V. and Amon, L. and Boelaert, N. and Cakirli, R. B. and Casten, R. F. and Clark, R. M. and Fransen, C. and Gelletly, W. and Gürdal, G. and Heidemann, M. and Keyes, K. L. and Erduran, M. -N. and Meyer, D. A. and Papenberg, A. and Plettner, C. and Rainovski, G. and Ribas, R. V. and Thomas, N. J. and Vinson, J. and Warner, D. D. and Werner, V. and Williams, E. and Zell, K. O.},
abstractNote = {Two separate experiments using the Differential Decay Curve Method have been performed to extract mean lifetimes of excited states in 106Cd. The medium-spin states of interest were populated by the 98Mo( 12C, 4n)106Cd reaction performed at the Wright Nuclear Structure Lab., Yale University. From this experiment, two isomeric state mean lifetimes have been deduced. The low-lying states were populated by the 96Mo(13C, 3n)106Cd reaction performed at the Institut für Kernphysik, Universität zu Köln. The mean lifetime of the Iπ = 21+ state was deduced, tentatively, as 16.4(9) ps. This value differs from the previously accepted literature value from Coulomb excitation of 10.43(9) ps.},
doi = {},
journal = {Acta Physica Polonica. Series B},
number = ,
volume = 38,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2007},
month = {Sun Apr 01 00:00:00 EDT 2007}
}

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  • The Cd isotopes are well studied, but experimental data for the rare isotopes are sparse. At energies above the Coulomb barrier, higher states become accessible. Purpose: Remeasure and supplement existing lifetimes and magnetic moments of low-lying states in Cd106. In an inverse kinematics reaction, a Cd106 beam impinging on a C12 target was used to Coulomb excite the projectiles. The high recoil velocities provide a unique opportunity to measure g factors with the transient-field technique and to determine lifetimes from lineshapes by using the Doppler-shift-attenuation method. Large-scale shell-model calculations were carried out for Cd106. The g factors of the 21+more » and 41+ states in Cd106 were measured to be g(21+)=+0.398(22) and g(41+)=+0.23(5). A lineshape analysis yielded lifetimes in disagreement with published values. The new results are τ(Cd106;21+)=7.0(3)ps and τ(Cd106;41+)=2.5(2)ps. The mean life τ(Cd106;22+)=0.28(2)ps was determined from the fully-Doppler-shifted γ line. Mean lives of τ(Cd106;43+)=1.1(1)ps and τ(Cd106;31-)=0.16(1)ps were determined for the first time. The newly measured g(41+) of Cd106 is found to be only 59% of the g(21+). This difference cannot be explained by either shell-model or collective-model calculations.« less
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