Nuclear Data Sheets for A=182

Abstract

Nuclear spectroscopic information for known nuclides of mass number 182 (Lu,Hf,Ta,W,Re,Os,Ir,Pt,Au,Hg, Tl,Pb) with Z=71 to 82 and N=111 to 100 have been evaluated and presented together with adopted energies and J π o f l e v e l s i n t h e s e n u c l e i . N o e x c i t e d s t a t e d a t a a r e y e t a v a i l a b l e f o r 1 8 2 L u , w h i l e o n l y l i m i t e d s t r u c t u r e i n f o r m a t i o n i s a v a i l a b l e f o r 1 8 2 P b a n d 1 8 2 T l . R o t a t i o n a l b a n d s t r u c t u r e s a r e k n o w n f o r 1 8 2 H g a n d 1 8 2 A u b u t s p i n -p a r i t y a s s i g n m e n t s r e m a i n l a r g e l y t e n t a t i v e . T h e d e c a y s o f 1 8 2 L u , 1 8 2 H g , 1 8 2 A u a n d 1 8 2 T l a r e n o t w e l l established. The 182 Hf isotope is of geophysical and astrophysical interest. This evaluation supersedes previous full evaluations of A=182 published by 1988Fi05 and 1975Sc13, and a selected (mainly high-spin) update of A=182 published by 1995Si04. Cutoff Date: Literature available up to July 15, 2010 has been consulted. General Policies and Organization of Material: See the January issue of the Nuclear Data Sheets or http://www.nndc.bnl.gov/nds/NDSPolicies.pdf. G e n e r a l C o m m e n t s : T h e s t a t i s t i c a l a n a l y s i s o f γ -r a y d a t a a n d d e d u c e d l e v e l s c h e m e s i s c a r r i e d o u t t h r o u g h computer codes available at NNDC, BNL website: www.nndc.bnl.gov. The direct feedings to excited states in β -a n d ε d e c a y s h a v e g e n e r a l l y b e e n c o m p u t e d f r o m I ( γ + c e ) i n t e n s i t y b a l a n c e s a t e a c h l e v e l ; t h e a s s o c i a t e d l o g f t v a l u e s a r e c a l c u l a t e d u s i n g L O G F T c o d e . T h e t o t a l i n t e r n a l c o n v e r s i o n c o e f f i c i e n t s c o r r e s p o n d i n g t o a s s i g n e d m u l t i p o l a r i t i e s a n d m i x i n g r a t i o s a r e t h e o r e t i c a l v a l u e s c a l c u l a t e d u s i n g B r I c c c o d e ( 2 0 0 8 K i 0 7 ) . A general 1.4% uncertainty is assumed in quoted theoretical internal conversion coefficients. All Q values have been adopted from 2003Au03 an 2009AuZZ (an interim mass adjustment file). The static magnetic and quadrupole moments are from 1989Ra17 and 2005St24 compilations when available. Relevant data for A=186 isotopes which decay by α decay to A=182 isotopes have been taken primarily from A=186 NDS (2003Ba44) A c k n o w l e d g m e n t s : T h e e v a l u a t o r s t h a n k M c M a s t e r s t u d e n t s S . G e r a e d t s , M . L e e , G . R e e d a n d J . C h e n k i n f o r compilation of several XUNDL datasets for A=182 nuclides; and Charles Reich (Idaho) for a detailed review of this work and many useful suggestions.

Decay spectroscopy with Solenogam at the ANU Heavy Ion Accelerator Facility

“…[14], and mixing ratios from Ref. [9]. There was qualitative agreement between the fitted and the calculated correlations (see Fig.…”

“…Unfortunately, the excited 0 + state at 1135 keV was not populated in the decay so pure E0 transitions were not produced. Gamma-rays were assigned to 182 W by comparison with previously measured energies and intensities [9]. Electron lines were assigned using the known tungsten K, L and M binding energies of 69.5, 11.5 and 2.2 keV, respectively [12].…”

High-precisionγ-ray spectroscopy of the cardiac PET imaging isotopeRb82and its impact on dosimetry

“…[19] using very well-known transitions in the decay of 182 Ta [20] and 56 Co [21]. The intensities reported here include a 2% systematic uncertainty on efficiency for E γ < 1 MeV and 5% for energies larger than 1 MeV.…”

Measurement of (n,xnγ) reaction cross sections in W isotopes

“…1 for transitions in the fundamental rotational band and Fig. 2 for transitions between the first excited band and the fundamental band [13][14][15]. In fact, more than 20 transitions are studied for each isotope, decaying from levels as high in excitation energy as 1.5 MeV, within and between several excitation bands.…”