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Title: Recoil Distance Method Lifetime Measurements in 107Cd and 103Pd

Abstract

Preliminary lifetime values have been measured for a number of near-yrast states in the odd-A transitional nuclei 107Cd and 103Pd. The reaction used to populate the nuclei of interest was 98Mo(12C,3nx{alpha})107Cd, 103Pd, with the beam delivered by the tandem accelerator of the Wright Nuclear Structure Laboratory at an incident beam energy of 60 MeV. Our experiment was aimed at the investigation of collective excitations built on the unnatural parity, {nu} h11/2 orbital, specifically by measuring the B(E2) values of decays from the excited levels built on this intrinsic structure, using the Doppler Recoil Distance Method. We report lifetimes and associated transition probabilities for decays from the 15/2- and the 19/2- states in 107Cd and the first measurement of the 15/2- state in 103Pd. These results suggest that neither a simple rotational or vibrational interpretation is sufficient to explain the observed structures.

Authors:
 [1]; ;  [2]; ; ; ; ; ; ; ;  [3]; ; ;  [4];  [5];  [3];  [6]; ;  [7]; more »;  [8] « less
  1. Dept. of Physics, Royal Institute of Technology, S-104 05 Stockholm (Sweden)
  2. Dept. of Physics, University of Surrey, Guildford GU2 7XH (United Kingdom)
  3. WNSL, Yale University, New Haven, CT 06520 (United States)
  4. Dept. of Physics, Istanbul University, Istanbul (Turkey)
  5. Lawrence Berkeley National Lab, Berkeley, CA 94720 (United States)
  6. (United States)
  7. Institute of Physical Research, University of Paisley, Paisley PA1 2BE (United Kingdom)
  8. Dept. of Physics and Astronomy, SUNY, Stony Brook, NY 11794 (United States) (and others)
Publication Date:
OSTI Identifier:
20798568
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 831; Journal Issue: 1; Conference: International conference on frontiers in nuclear structure, astrophysics, and reactions - FINUSTAR, Isle of Kos (Greece), 12-17 Sep 2005; Other Information: DOI: 10.1063/1.2200959; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CADMIUM 107; CARBON 12; CARBON 12 REACTIONS; CHARGE PLUNGER METHOD; COLLECTIVE EXCITATIONS; EXCITED STATES; LIFETIME; MEV RANGE; MOLYBDENUM 98; MOLYBDENUM 98 TARGET; NUCLEAR DECAY; NUCLEAR STRUCTURE; PALLADIUM 103; PARITY; PROBABILITY; TANDEM ELECTROSTATIC ACCELERATORS; YRAST STATES

Citation Formats

Andgren, K., Ashley, S. F., Regan, P. H., McCutchan, E. A., Zamfir, N. V., Casten, R. F., Meyer, D. A., Plettner, C., Vinson, J., Werner, V., Williams, E., Amon, L., Cakirli, R. B., Erduran, M. N., Clark, R. M., Guerdal, G., Clark University, Worcester, Massachusetts, 01610-1477, Keyes, K. L., Papenberg, A., Pietralla, N., and Rainovski, G. Recoil Distance Method Lifetime Measurements in 107Cd and 103Pd. United States: N. p., 2006. Web. doi:10.1063/1.2200959.
Andgren, K., Ashley, S. F., Regan, P. H., McCutchan, E. A., Zamfir, N. V., Casten, R. F., Meyer, D. A., Plettner, C., Vinson, J., Werner, V., Williams, E., Amon, L., Cakirli, R. B., Erduran, M. N., Clark, R. M., Guerdal, G., Clark University, Worcester, Massachusetts, 01610-1477, Keyes, K. L., Papenberg, A., Pietralla, N., & Rainovski, G. Recoil Distance Method Lifetime Measurements in 107Cd and 103Pd. United States. doi:10.1063/1.2200959.
Andgren, K., Ashley, S. F., Regan, P. H., McCutchan, E. A., Zamfir, N. V., Casten, R. F., Meyer, D. A., Plettner, C., Vinson, J., Werner, V., Williams, E., Amon, L., Cakirli, R. B., Erduran, M. N., Clark, R. M., Guerdal, G., Clark University, Worcester, Massachusetts, 01610-1477, Keyes, K. L., Papenberg, A., Pietralla, N., and Rainovski, G. Wed . "Recoil Distance Method Lifetime Measurements in 107Cd and 103Pd". United States. doi:10.1063/1.2200959.
@article{osti_20798568,
title = {Recoil Distance Method Lifetime Measurements in 107Cd and 103Pd},
author = {Andgren, K. and Ashley, S. F. and Regan, P. H. and McCutchan, E. A. and Zamfir, N. V. and Casten, R. F. and Meyer, D. A. and Plettner, C. and Vinson, J. and Werner, V. and Williams, E. and Amon, L. and Cakirli, R. B. and Erduran, M. N. and Clark, R. M. and Guerdal, G. and Clark University, Worcester, Massachusetts, 01610-1477 and Keyes, K. L. and Papenberg, A. and Pietralla, N. and Rainovski, G.},
abstractNote = {Preliminary lifetime values have been measured for a number of near-yrast states in the odd-A transitional nuclei 107Cd and 103Pd. The reaction used to populate the nuclei of interest was 98Mo(12C,3nx{alpha})107Cd, 103Pd, with the beam delivered by the tandem accelerator of the Wright Nuclear Structure Laboratory at an incident beam energy of 60 MeV. Our experiment was aimed at the investigation of collective excitations built on the unnatural parity, {nu} h11/2 orbital, specifically by measuring the B(E2) values of decays from the excited levels built on this intrinsic structure, using the Doppler Recoil Distance Method. We report lifetimes and associated transition probabilities for decays from the 15/2- and the 19/2- states in 107Cd and the first measurement of the 15/2- state in 103Pd. These results suggest that neither a simple rotational or vibrational interpretation is sufficient to explain the observed structures.},
doi = {10.1063/1.2200959},
journal = {AIP Conference Proceedings},
number = 1,
volume = 831,
place = {United States},
year = {Wed Apr 26 00:00:00 EDT 2006},
month = {Wed Apr 26 00:00:00 EDT 2006}
}