247ES 251MD A DECAY 2006CH52,2005HE27 15NDS 201503
247ES H TYP=FUL$AUT=C. D. NESARAJA$CIT=NDS 125, 395 (2015)$CUT=31-Mar-2014$
247ES c 2006Ch52: {+251}Md isotope produced
247ES2c in |a decay of {+255}Lr isotope. Parent nuclide produced by
247ES3c {+209}Bi({+48}Ca,2n) reaction, in two separate
247ES4c experiments conducted at JYFL and GANIL. In both experiments, an
247ES6c incident beam energy of E|?217 MeV was used. Recoil products
247ES7c separated from the primary beam in each.
247ES8c JYFL: Measured recoil products, E|a, I|a, and tof using a
247ES9c Multi-Wire Proportional Counter gas detector, two double-sided Si
247ESac strip detectors (DSSSD) and a "box" of 28 pin-diodes surrounding the
247ESbc two DSSSDs.
247EScc GANIL: Measured recoiled products, E|g, I|g, E|a, I|a, ce, and tof
247ESdc using a "galotte" detector (mylar foil and micro-channel plate
247ESec detector), a DSSSD, four cooled Si detectors (BEST) and four segmented
247ESfc Ge detectors (EXOGAM).
247ES c Theoretical calculations using Hartree-Fock-Bogoliubov (HFB) with
247ES2c Skyrme were performed to interpret the experimental results
247ES c 2005He27: {+251}Md produced from |a decay of
247ES2c {+255}Lr. {+255}Lr produced by the {+209}Bi({+48}Ca,2n) reaction
247ES3c with beam energy E=4.55-4.65 MeV/nucleon.
247ES4c Evaporation residues were separated from the primary beam by velocity
247ES5c filter SHIP at GSI facility. Measured (fragments)-|a coin, |a-|g coin,
247ES6c prompt and delayed |g-rays, and K x-rays.
247ES7c |g-rays were detected with a 'Clover' detector and a position
247ES8c sensitive (PIPS) detector was used to measure the |a decay.
247ES cA $|a line at 7590 {I5} in the |a spectrum in 2006Ch52 is assigned to a
247ES2cA sum line with an intensity of 13 {I3} relative to 87 {I3} for 7550|a.
247ES3cA This line was not clear if it was present in the work of 2005He27
247ES cA E$Energies from JYFL experiment in 2006Ch52, which had better
247ES2cA resolution.
247ES CA HF$r{-0}({+247}Es)=1.476 20, estimated by the evaluator from the
247ES2CA r{-0} systematics given in 1998Ak04.
247ES cG E$From |a-|g coincidences in 2005He27 with higher precision
247ES cG RI$From 2005He27
251MD P 0.0 (7/2-) 4.27 M 26 7963 4
251MD cP T$From measured half-life of 7550|a from decay of {+251}Md (2006Ch52)
251MD cP QP$From 2012Wa38. Q(g.s)= 7965 {I1} from E|a=7550 to 293+x level
251MD2cP (2006Ch52); Q(g.s)=7955 {I10} from E|a=7540 {I10} to 293+x,
251MD3cP assuming x is small
251MD cP J$From Adopted Levels in {+251}Md (2013Br09)
251MD cP $Proposed configuration=7/2[514] (2005He27)
247ES N 0.10 1
247ES cN BR$%|a=10 {I1} from comparison of the intensities in |a-|a and
247ES2cN recoil-|a coincidences in |a decay of {+255}Lr grand-mother nucleus
247ES3cN (2006Ch52)
247ES L 0 (3/2-)
247ES cL J$Possibly 3/2-[521] (2005He27)
247ES L 0+X (7/2+)
247ES DL E LEVEL ENERGY HELD FIXED IN LEAST-SQUARES ADJUSTMENT
247ES cL $Proposed configuration=7/2[633] (1989Ha27)
247ES cL E$The assignment to g.s. is not certain; 3/2[521] and
247ES2cL 7/2[633] orbitals are close in energy and either could be the g.s.,
247ES3cL 2005He27 estimate that 7/2+ bandhead of 7/2[633] band lies |?30 keV
247ES4cL above the 3/2- bandhead of 3/2[521] band.
247ES L 50.9+X 3 (9/2+)
247ES cL E$The unobserved transition depopulating this level is shown by
247ES2cL 2006Ch52 to be a highly-converted (possibly M1) transition.
247ES cL J$Suggested by theoretical calculations in 2006Ch52.
247ES G 50 (M1) S
247ES cG $Highly converted transition
247ES L 293.69+X 10 (7/2-)
247ES cL $Proposed configuration=7/2[514] (based upon multipolarities proposed
247ES2cL for depopulating |g transitions).
247ES A 7550 1 100 1.12 15
247ES cA E$Others: 7540 {I10} (2005He27); 7310 {I30} (1973Es01)
247ES G 242.7 3 16 2(E1)
247ES cG M$E2 is also possible but less likely.
247ES G 293.7 1 100 (E1)
247ES2 G EKC LE 0.08$ ELC LE 0.16 (2005He27)
247ES cG RI$I|g(293)/I|g(243)=4.4 {I2} (2006Ch52)