249MD    253LR A DECAY (1.61 S)        2022HU21,2009HE20,2008GA2524NDS    202403
249MD  H TYP=FUL$AUT=C.D. Nesaraja$CIT=NDS 195, 718 (2024)$CUT=12-Oct-2023$
249MD c  2022Hu21: {+253}Lr produced in the {+205}Tl({+50}Ti,2n) at the ATLAS
249MD2c  linear accelerator at Argonne National Laboratory. The {+253}Lr
249MD3c  was separated in the Argonne Gas-Filled Analyzer (AGFA) and then
249MD4c  passed through a parallel grid avalanche counter (PGAC). It was
249MD5c  then implanted into doublesided Si strip detector (DSSD). Alphas
249MD5c  escaping the DSSD were deposited into an array of single-sided Si strip
249MD6c  detectors (SSSD). Measured E|a, t{-1/2} and |a branching ratio.
249MD c  2010He11: |a decay from the {+253}Lr which was produced
249MD2c  from the |a decay of {+257}Db was measured at the UNILAC accelerator
249MD3c  at GSI, Darmstadt. {+257}Db, the evaporated residue was separated by
249MD4c  the velocity filter SHIP and implanted into a 16-strip Si PIPS
249MD5c  detector. Six Si detectors were used to measure escaping |a-particles
249MD6c  from the decay of the {+253}Lr.
249MD c  2009He20: {+253}Lr produced in the {+209}Bi({+48}Ti,4n) reaction and
249MD2c  from the |a decay of {+257}Db at the UNILAC accelerator at GSI
249MD3c  Darmstadt. Evaporation residues were separated by the velocity filter
249MD4c  SHIP and implanted into a 16-strip Si PIPS detector. A box of six
249MD5c  Si wafers was used to measure escaping |a particles. A Ge clover
249MD6c  detector consisting of four crystals was used to measure gammas in
249MD7c  coincidence with particles. Measured E|a and half-life.
249MD c  2008Ga25: The {+257}Db isotope produced in {+209}Bi({+50}Ti,2n) and
249MD2c  {+208}Pb({+51}V,2n) reactions at 4.7-5.1 MeV/nucleon beams of
249MD3c  {+51}V and {+50}Ti provided by 88-Inch Cyclotron at
249MD4c  LBNL. Detected |a particles using silicon implantation detectors.
249MD c  2001He35: |a decay from the {+253}Lr which was produced
249MD2c  from the |a decay of {+257}Db was measured at the UNILAC accelerator
249MD3c  at GSI, Darmstadt. {+257}Db. The evaporated residue was separated by
249MD4c  the velocity filter SHIP and implanted into a 16-strip Si PIPS
249MD5c  detector. Six Si detectors were used to measure escaping |a-particles
249MD6c  from the decay of the {+253}Lr. The observed |a-spectra revealed
249MD7c  the existence of an isomeric state.
249MD c  1986He28,1985He22: {+253}Lr was produced from heavy-ion fusion reaction
249MD2c  of {+50}Ti and {+209}Bi. It was separated from the projectile beam
249MD3c  by the velocity filter SHIP and identified after implantation into an
249MD4c  array of position-sensitive surface-barrier detectors by analyzing
249MD5c  the |a-decay chains. Measured E|a, t{-1/2} and |a branching ratio.
249MD c  Other: 1999He11
249MD cA HF$The nuclear radius parameter r{-0}({+249}Md)=1.478 {I29} is deduced
249MD2cA from interpolation of radius parameters of the adjacent even-even
249MD3cA nuclides in 2020Si16
249MD cA IA$I(8715|a)=27 {I13} (2022Hu21) has been normalized to 100
249MD cL J,T$From Adopted Levels
253LR  P 0.0+X       (1/2-)            1.61 S    22             8918      20
253LR cP QP$From 2021Wa16
253LR cP T$From unweighted average of 2.46 s {I5} (2022Hu21),
253LR2cP 1.2 s {I+7-4} (2010He11), 1.32 s {I14} (2009He20), 1.60 s {I+24-18}
253LR3cP (2008Ga25) and 1.49 s {I+30-21} (2001He35).
253LR4cP T{-1/2} for {+253}Lr prior to 2022Hu21 is 0.57 s {I+7-6} (2013Br09)
253LR cP J$From Adopted Levels of {+253}Lr in ENSDF database (2013Br09)
249MD  N                        0.920  5
249MD cN BR$From %SF=8.0 {I5} (2017He08).
249MD2cN %|a for {+253}Lr prior to 2017He08 is |?98.7 (2013Br09)
249MD  L  0.0        (7/2-)            24.8 S    10
249MD cL $Configuration=7/2-[514] (2022Hu21)
249MD  L 0.0+X       (1/2-)            1.5 S     +12-5                       M
249MD  A  8715     20100       2.2     17
249MD cA E$From 2022Hu21.