50TI    50V EC DECAY (2.65E+17 Y)     2019LA09,2011DO08,1989SI0719NDS    201906
 50TI  H TYP=FUL$AUT=Jun Chen and Balraj Singh$CIT=NDS 157, 1 (2019)$
 50TI2 H CUT=15-Apr-2019$
 50TI c  2019La09: {+50}V sample was produced from vanadium flakes by multifold
 50TI2c  electron beam melting (EBM) at the Gran Sasso Underground Laboratory
 50TI3c  (LNGS). The |g rays were detected with ultra-low background (ULB) HPGe
 50TI4c  detectors. Measured activities. Deduced parent partial half-life.
 50TI c  2011Do08: natural 255.82 g {+50}V sample measured for 97.8 d (total
 50TI2c  detector mass measuring time product=185.8 kg.d). Ultralow background
 50TI3c  Ge-detector (ULB detector) at the underground laboratory for dosimetry
 50TI4c  and spectrometry of the PTB in Germany. Detector calibrated with
 50TI5c  solutions of known activity provided by PTB. Results corrected for
 50TI6c  contaminations from {+238}U and {+232}Th, mass of water (determined at
 50TI7c  PTB) and oxygen (determined at German Federal Institute for Materials
 50TI8c  Research) in sample resulting from exposure to air subtracted when
 50TI9c  calculating activity concentration. Measured partial half-life of
 50TIAc  {+50}V |e decay
 50TI c  1989Si07: measured 1554|g and deduced T{-1/2}(|e); three large Ge
 50TI2c  detectors in a salt mine; 337.5 g of natural V, 1109 h and a background
 50TI3c  run of 4206 h; corrections were made for Th and U contaminants.
 50TI c  1985Si02 (same group as 1989Si07): measured 1554|g and deduced
 50TI2c  T{-1/2}(|e); intrinsic Ge; 100.6 g of natural V, 193.3 h and background
 50TI3c  run of 100 d; correction for U contaminants.
 50TI c  1984Al10: measured 1554|g and deduced T{-1/2}(|e); Ge(HP); 4250 g of
 50TI2c  natural V, 135.5 d.
 50V   P    0.0                6+      2.65E+17 Y+16-18           2207.6  4
 50V  cP J,T$From {+50}V Adopted levels
 50V  cP QP$From 2017Wa10
 50TI  N    1.0                0.993   7   1.007
 50TI cN NR$From I|g(1554|g)=100. From Q(|e) only the g.s. and 1554
 50TI2cN state may be populated. |DJ=6, |D|p=no to g.s. and |DJ=4, |D|p=no to
 50TI3cN 1554 state; therefore, only the 1554 state is expected to be fed in
 50TI4cN this decay
 50TI cN BR$%|e=99.3 {I7} based on %|e>98.6 deduced from
 50TI2cN T{-1/2}(|e+|b{++})=2.67|*10{+17} y {I+16-18} (68% confidence interval)
 50TI3cN and T{-1/2}(|b{+-})>1.9|*10{+19} y (90% confidence interval) in
 50TI4cN 2019La09. Others: 96.5 {I35} based on >92.9 deduced by 2011Do08 from
 50TI5cN non-observation of |b{+-} decay activity through the 783|g in {+52}Cr;
 50TI6cN %|e=83 {I11} in 1989Si07 was based on observed %|b{+-}=17 {I11}. No
 50TI7cN |b{+-} decay has yet been confirmed, as e.g. in 2019La09 and 2011Do08.
 50TI8cN See also comment for {+50}V g.s. in Adopted Levels
 50TI PN                                                                     4
 50TI  L    0.0              0+
 50TI  L   1553.77  6        2+
 50TI cL J$from the Adopted Levels.
 50TI  E                         99.3  7  23.63  6
 50TIS E CK=0.8925$CL=0.09170$CM+=0.01581
 50TI cE IE$deduced from partial T{-1/2} of |e and |b{+-} decay modes in
 50TI2cE 2019La09. Others: %|e>92.9 measured by 2011Do08 from observation of no
 50TI3cE |b{+-} activity; %|e=83 {I11} (1989Si07).
 50TI cE LOGFT$calculated for allowed decay
 50TI  G  1553.77   6  100      E2
 50TI cG E$from 1984Al10
 50TI cG M$from the Adopted Gammas