180TA    180TA B-+EC:T1/2:XUNDL-7      2017LE01                           201706
180TA c  Compiled (unevaluated) dataset from 2017Le01:                          
180TA2c  Phys Rev C 95, 044306 (2017)                                           
180TA c  Compiled by J. Chen (NSCL/MSU), May 30, 2017                           
180TA c  2017Le01: Samples are high purity tantalum of natural isotopic         
180TA2c  composition. Measurement was performed in the laboratory of HADES,     
180TA3c  225-m underground at the premises of the Belgian Nuclear Research      
180TA4c  Centre SCK-ce(N). Searched for the decay of {+180m}Ta with an ultralow 
180TA5c  background sandwich HPGe |g-ray spectrometry setup. No signal was      
180TA6c  observed for either |b{+-} or electron-capture (|e) decay modes of     
180TA7c  {+180m}Ta. Deduced lower limits for half-lives of |b{+-} and |e decay  
180TA8c  modes, and for the total half-life. Comparisons with available data.   
180TA  L 77.2      12 9-               4.5E16 Y   GT                         M1 
180TA cL E,J$from Adopted Levels of {+180}Ta in ENSDF database.                 
180TA cL T$deduced by 2017Le01 from lower limits of 5.8|*10{+16} y for |b{+-}   
180TA2cL decay mode and 2.0|*10{+17} y for |e decay mode with 90%  confidence   
180TA3cL level.                                                                 
                                                                                
180TA    TA(P,X):ISOMER E:XUNDL-8      2022NE10                           202209
180TA c  Compiled (unevaluated) dataset from 2022Ne10                           
180TA c  Phys. Rev. C 106, 024310 (2022)                                        
180TA c  Compiled by S. Ota (NNDC,BNL). Aug. 16, 2022                           
180TA c  {+180}Ta and {+180m}Ta (the second excited states) ions were           
180TA2c  simultaneously produced with a 40 MeV proton beam impinging into a     
180TA3c  {+nat}Ta target with the thickness of about 5 mg/cm{+2} at the IGISOL  
180TA4c  facility (University of Jyvaskyla). The mass of the {+180m}Ta was      
180TA5c  determined using the JYFLTRAP Penning trap mass spectrometer from the  
180TA6c  measured cyclotron frequency ratios to the ground state. The           
180TA7c  excitation energy of the isomeric state was deduced in reference to    
180TA8c  the ground state mass.                                                 
180TA  L 0            1+                8.154 H   6                             
180TA cL J,T$from ENSDF database.                                               
180TA  L 39.54     5  2+                                                        
180TA cL E,J$from ENSDF database.                                               
180TA  L 76.79     55 9-                7.1E15 Y  GT                            
180TA cL J,T$from ENSDF database.                                               
180TA cL E$from 2022Ne10. The weighted mean of the measured cyclotron           
180TA2cL frequency ratios to the ground state is 1/1.0000004581 {I33}.          
                                                                                
180TA    180TA B-+EC:T1/2:XUNDL-9      2023AR11                           202312
180TA c  Compiled (unevaluated) dataset from 2023Ar11:                          
180TA2c  Phys Rev Lett 131, 152501 (2023)                                       
180TA c  Compiled by E.A. McCutchan (NNDC,BNL) December 4, 2023                 
180TA c  Samples are high purity tantalum, 2 disks, each 2 mm thick and 181 g   
180TA2c  mass. Measurement was performed with the Majorana Demonstrator         
180TA3c  consisting of two arrays of HPGe detectors in vacuum cryostats.        
180TA4c  Searched for the decay of {+180m}Ta.                                   
180TA5c  No signal was                                                          
180TA6c  observed for any decay mode of                                         
180TA7c  {+180m}Ta. Deduced lower limits for half-lives of |b{+-}, |e decay     
180TA8c  |g, IC and |a decay modes, and for the total half-life.                
180TA  L 77.2      12 9-               0.29E18 Y GT                          M1 
180TA cL E,J$from Adopted Levels of {+180}Ta in ENSDF database.                 
180TA cL T$deduced by 2023Ar11 from lower limits of 15.4|*10{+18} y {I27} for   
180TA2cL |b{+-} decay mode, 13.3|*10{+18} y {I22} for |e decay mode,            
180TA3cL 0.63|*10{+18} y {I8} for |g decay, 0.29|*10{+18} y {I4} for IC decay   
180TA4cL and 11.3|*10{+18} y {I22} for |a decay, all with 90% confidence level. 
                                                                                
180TA    180TA B-+EC:T1/2:XUNDL-10     2023CE02                           202410
180TA c  Compiled (unevaluated) dataset from 2023Ce02:                          
180TA c  Eur. Phys J C 83, 925 (2023)                                           
180TA c  Compiled by E.A. McCutchan (NNDC,BNL) October 4, 2024                  
180TA c  Samples were 6 tiles of metallic Ta, each 10x10x0.2 cm{+3} with        
180TA2c  a mass of 335 g. Measurement was performed with an ULB-HPGe detector,  
180TA3c  shielded with Cu and low-radioactivity lead at the STELLA laboratory.  
180TA4c  Searched for the decay of {+180m}Ta.                                   
180TA5c  No signal was                                                          
180TA6c  observed for any decay mode of                                         
180TA7c  {+180m}Ta. Deduced lower limits for half-lives of |b{+-}, |e decay     
180TA8c  and IC decay modes.                                                    
180TA  L 77.2      12 9-               6.5E17 Y  GT                          M1 
180TA cL E,J$from Adopted Levels of {+180}Ta in ENSDF database.                 
180TA cL T$deduced by 2023Ce02 from lower limits of >1.1|*10{+18} y for         
180TA2cL |b{+-} decay mode and >1.6|*10{+18} y for |e decay mode. Other:        
180TA3cL > 4.1|*10{+15} y for IC decay (2023Ce02).  All reported values         
180TA4cL are for 90% confidence level.