Charge State Blocking of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="italic">K</mi></math></span>-Shell Internal Conversion in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow></mrow><mrow><mn>125</mn></mrow></msup></mrow></math></span>Te

F. Attallah; M. Aiche; J. F. Chemin; J. N. Scheurer; W. E. Meyerhof; J. P. Grandin; P. Aguer; G. Bogaert; J. Kiener; A. Lefebvre; J. P. Thibaud; C. Grunberg

doi:10.1103/PhysRevLett.75.1715

Charge State Blocking of $K$ -Shell Internal Conversion in $^{125}$ Te

F. Attallah, M. Aiche, J. F. Chemin, J. N. Scheurer, W. E. Meyerhof, J. P. Grandin, P. Aguer, G. Bogaert, J. Kiener, A. Lefebvre, J. P. Thibaud, and C. Grunberg

Phys. Rev. Lett. 75, 1715 – Published 28 August 1995

Abstract

We have studied the atomic charge state dependence of the nuclear lifetime of the 35.5-keV first excited state of $^{125}$ Te. For the 4 $7^{+}$ and 4 $8^{+}$ ions, 300% and 640% increases, respectively, of the half-life were found with respect to the neutral-atom value (1.49 ns). These unusually large effects are due to the energetic blocking of $K$ -shell internal conversion as the charge state increases past 4 $7^{+}$ .

Received 18 January 1995

DOI:https://doi.org/10.1103/PhysRevLett.75.1715

Authors & Affiliations

F. Attallah¹, M. Aiche¹, J. F. Chemin¹, J. N. Scheurer¹, W. E. Meyerhof², J. P. Grandin³, P. Aguer⁴, G. Bogaert⁴, J. Kiener⁴, A. Lefebvre⁴, J. P. Thibaud⁴, and C. Grunberg⁵

¹Centre d'Etudes Nucléaires de Bordeaux-Gradignan, IN2P3-Centre National de la Recherche Scientifique, Université de Bordeaux, 33175 Gradignan, France
²Department of Physics, Stanford University, Stanford, California 94305
³Centre Interdisciplinaire de Recherches avec les Ions Lourds75, 14040 Caen, France
⁴Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, IN2P3-Centre National de la Recherche Scientifique, Université d'Orsay, 91405 Orsay, France
⁵Grand Accélérateur National d'Ions Lourds, 14021 Caen, France