Inelastic scattering from separated lutecium isotopes

doi:10.1016/0029-5582(59)90216-0

Nuclear Physics

Volume 10, February–May 1959, Pages 294-305

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Abstract

Lutecium targets of high isotopic purity have been prepared in an electromagnetic isotope separator. In order to obtain thin deposits of the target material on fragile backings, a method has been developed where the ions after the separation are strongly retarded by an electrical potential on the collector. Targets prepared in this way have been used to study the Coulomb excitation of the rare odd isotope Lu¹⁷⁶ and of the abundant isotope Lu¹⁷⁵ by observation of inelastically scattered protons and deuterons in a magnetic spectrometer. The measured excitation energies and transition probabilities in Lu¹⁷⁶ are in good agreement with the predictions of the rotational model if the ground state spin of this isotope is 7.

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Highlights of this publication are the following:
This evaluation includes the first study (1996Zh03) of ¹⁷⁵Er β⁻ decay, which has been used to interpret a predicted ground state doublet in ¹⁷⁵Tm.
The deep-inelastic reaction studies (1999As05, 1997Le11, and 1997Le10) extended the yrast band of ¹⁷⁵Yb to the $J π = 41 / 2 -$ level at 4426 keV.
New studies (1994Mi04) of ¹⁷⁵Yb β⁻ decay have provided significantly more precise γ-ray intensities.
New data (2002Ro17 and 1998To14) from the alpha decay of ¹⁷⁹Tl have been used for tentatively assigning spin and parity to ¹⁷⁵Au ground and first-excited states. Tentative assignment of ¹⁷⁵Hg g.s. is adopted from ¹⁷⁶Tl proton decay (2004Ke06).
Nuclear data sheets for A = 176
1998, Nuclear Data Sheets
This evaluation presents data for all nuclei with mass number A = 176, which includes level schemes deduced from radioactive decay and nuclear reaction studies.
A level at 838.64 keV 5 (Jπ=5−) in¹⁷⁶Lu was confirmed by¹⁷⁵Lu(n,γ) E=thermal (91Kl02) and¹⁷⁶Yb(p,nγ) (91Le28) studies. This level provides a path for transformation of¹⁷⁶Lu(E=0.0, T_1/2=4.0×10¹⁰y) into¹⁷⁶Lu(E=122.855 keV 6, T_1/2=3.664 hr.) during a hot bath in the stellar s-process environment. Consequently, the production of¹⁷⁶Lu becomes a sensitive function of temperature, thus, this isotope cannot be used as an s-process chronometer.
Nuclear data sheets update for A = 59*
1993, Nuclear Data Sheets
Nuclear structure data pertaining to all nuclei with mass number A = 59 have been compiled and evaluated, and incorporated into the ENSDF data file. Only new or significantly revised data sets are published here, together with all adopted level and adopted γ-ray data information for the A = 59 isobars. This evaluation for A = 59 may be used in conjunction with the previous (full) publication (P. Andersson, L.P. Ekstrom and J. Lyttkens (83An22), published in Nuclear Data Sheets 39, 641 (1983); please note, however, that data sets which are not published here may, nevertheless, appear in revised form in the current ENSDF file.
Nuclear data sheets for A = 175*
1993, Nuclear Data Sheets
Nuclear data sheets for A = 176
1990, Nuclear Data Sheets
Spectroscopic data for all nuclei with mass number A=176 have been evaluated, and the corresponding level schemes from radioactive decay and reaction studies are presented.
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This evaluation for A=176 supersedes the earlier one by D. J. Horen and B. Harmatz (76Ho18), published in Nuclear Data Sheets 19, 383 (1976).

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Inelastic scattering from separated lutecium isotopes

Abstract

Nuclear Instruments

Nuclear Physics

Naturwiss.

Z. Phys.

Revs. Mod. Phys.

Phys. Rev.

Phys. Rev.

Phys. Rev.

Phys. Rev.