ADOPTED LEVELS, GAMMAS for 93Pd
Author: Coral M. Baglin | Citation: Nucl. Data Sheets 112, 1163 (2011) | Cutoff date: 15-Dec-2010
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-1.29×104 keV SY | S(n)= 1.21×104 keV SY | S(p)= 3.4×103 keV SY | Q(α)= -3.5×103 keV SY | ||
| Reference: 2012WA38 |
| References: | |||
| A | 94Ag p decay (0.39 S) | B | 40Ca(58Ni,αnγ) |
| C | 58Ni(40Ca,αnγ) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0.0 | ABC | (9/2+) | 1.00 s 9 % ε = 100 % εp = ? | |||||
| 983.5 3 | ABC | (13/2+) | 983.5 3 | 100 | Q | 0.0 | (9/2+) | |
| 1870.8 5 | A C | (15/2+) | 887.3 5 | 100 | (D) | 983.5 | (13/2+) | |
| 2079.3 5 | ABC | (17/2+) | 208.4 3 1095.7 5 | 12.8 23 100 10 | Q | 1870.8 983.5 | (15/2+) (13/2+) | |
| 2232.2 5 | A C | (17/2+) | 152.8 3 361.5 3 | 25 6 100 13 | (D) | 2079.3 1870.8 | (17/2+) (15/2+) | |
| 2428.5 6 | ABC | (19/2+) | 196.3 3 349.3 3 | 52 17 100 5 | (D) (D) | 2232.2 2079.3 | (17/2+) (17/2+) | |
| 2595.5 6 | ABC | (21/2+) | 167.0 3 516.3 5 | 100 7 58 16 | D (Q) | 2428.5 2079.3 | (19/2+) (17/2+) | |
| 2870.9 7 | ABC | (25/2+) | 275.4 3 | 100 | 2595.5 | (21/2+) | ||
| 3386.0 11 ? | A C | (25/2-,27/2-) | 514.5 10 ? | 100 | (D) | 2870.9 | (25/2+) | |
| 3735.1 11 ? | A C | (29/2-,31/2-) | 349.0 5 | 100 | 3386.0 | (25/2-,27/2-) | ||
| 3863.2 8 | ABC | (29/2+) | 992.4 4 | 100 | Q | 2870.9 | (25/2+) | |
| 4138.7 11 ? | A | (29/2-,31/2-) | 276? 403 | | [E1] | 3863.2 3735.1 | (29/2+) (29/2-,31/2-) | |
| 4752.7 15 ? | A | (33/2-,35/2-) | 614 | 100 | 4138.7 | (29/2-,31/2-) | ||
| 4995.6 9 | ABC | (33/2+) | 1132.3 5 | 100 | Q | 3863.2 | (29/2+) | |
| 5649.0 10 | BC | (37/2+) | 653.4 4 | 100 | Q | 4995.6 | (33/2+) | |
| 6994.9 11 | C | (39/2+) | 1346.0 5 | 100 | 5649.0 | (37/2+) | ||
| 7280.8 12 | BC | (41/2+) | 286.0 5 1631.6 10 | 50 20 100 20 | Q | 6994.9 5649.0 | (39/2+) (37/2+) | |
| 7662.9 12 | C | (45/2+) | 382.1 4 | 100 | 7280.8 | (41/2+) | ||
E(level): From least-squares fit to adopted Eγ, assigning 1 keV uncertainty to Eγ data for which the authors did not state an uncertainty.
Jπ(level): From 58Ni(40Ca,αnγ), except as noted, based on measured DCO ratios and on comparison of deduced structure with that for isotones 87Zr, 89Mo and 91Ru and with predictions from shell-model calculations performed in the restricted model space of g9/2 and p1/2 for proton and neutron holes (2004Ru02). These values assume Jπ(g.s.)=9/2+.
M(γ): From γ asymmetry ratio in 40Ca(58Ni,αnγ), except as noted.
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 1 - π=(+) ΔJ=2 yrast SEQUENCE. | |||||||
| 0.0 | (9/2+) | 1.00 s 9 % ε = 100 % εp = ? | |||||
| 983.5 3 | (13/2+) | 983.5 3 | 100 | Q | 0.0 | (9/2+) | |
| 2079.3 5 | (17/2+) | 208.4 3 1095.7 5 | 12.8 23 100 10 | Q | 1870.8 983.5 | (15/2+) (13/2+) | |
| 2595.5 6 | (21/2+) | 167.0 3 516.3 5 | 100 7 58 16 | D (Q) | 2428.5 2079.3 | (19/2+) (17/2+) | |
| 2870.9 7 | (25/2+) | 275.4 3 | 100 | 2595.5 | (21/2+) | ||
| 3863.2 8 | (29/2+) | 992.4 4 | 100 | Q | 2870.9 | (25/2+) | |
| 4995.6 9 | (33/2+) | 1132.3 5 | 100 | Q | 3863.2 | (29/2+) | |
| 5649.0 10 | (37/2+) | 653.4 4 | 100 | Q | 4995.6 | (33/2+) | |
| 7280.8 12 | (41/2+) | 286.0 5 1631.6 10 | 50 20 100 20 | Q | 6994.9 5649.0 | (39/2+) (37/2+) | |
| 7662.9 12 | (45/2+) | 382.1 4 | 100 | 7280.8 | (41/2+) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 2 - π=(-) sequence. | |||||||
| 3386.0 11 | (25/2-,27/2-) | ||||||
| 3735.1 11 | (29/2-,31/2-) | 349.0 5 | 100 | 3386.0 | (25/2-,27/2-) | ||
| 4138.7 11 | (29/2-,31/2-) | 276? 403 | | [E1] | 3863.2 3735.1 | (29/2+) (29/2-,31/2-) | |
| 4752.7 15 | (33/2-,35/2-) | 614 | 100 | 4138.7 | (29/2-,31/2-) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 4138.7 | (29/2-,31/2-) | 276 | [E1] | 0.00868 | α=0.00868 13, α(K)=0.00759 11, α(L)=0.000889 13, α(M)=0.0001662 24, α(N)=2.78×10-5 4, α(N+)=2.78E-5 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | (9/2+) | 1.00 s 9 % ε = 100 % εp = ? | E(level): π=(+) ΔJ=2 yrast SEQUENCE. T1/2(level): Unweighted average of 0.7 s +2-1 from ε-delayed proton decay and 1.0 s 3 from γ(t) for ε-delayed 240γ (2000Sc31), 1.0 s 2 (2001Ki13), 1.3 s 2 (2001Xu05 and 2005Xu04) and 1.0 s +3-2; supported by T1/2=0.9 s 6 and 0.9 s 4, respectively, for 382γ and γ|+ from 2000Sc31. The evaluator’s assignment of this T1/2 to the 93Pd g.s. is consistent with shell-model T1/2 predictions by 1997He24 (1.4 s). Note that T1/2=9.3 s +25-17, tentatively assigned to 93Pd by 2000WeZZ, appears to have been erroneous (see 2007WeZX). An E≈660-keV 1/2- state is predicted also (2000Sc31) and this possibly may Be isomeric. Other T1/2: 1976FaZW report a 60 s 20 proton activity in coincidence with x rays that suggest a 93Pd precursor; this tentative assignment to 93Pd remains unconfirmed and is probably not correct. |
| 983.5 | (13/2+) | E(level): π=(+) ΔJ=2 yrast SEQUENCE. | |
| 2079.3 | (17/2+) | E(level): π=(+) ΔJ=2 yrast SEQUENCE. | |
| 2595.5 | (21/2+) | E(level): π=(+) ΔJ=2 yrast SEQUENCE. | |
| 2870.9 | (25/2+) | E(level): π=(+) ΔJ=2 yrast SEQUENCE. | |
| 3386.0 | (25/2-,27/2-) | E(level): π=(-) sequence. Jπ(level): Tentative π=- level sequence built on (25/2-,27/2-) 3386 level; proposed because observed proton branches with similar strength to 4994 and 4751 levels in 94Ag p decay make it unlikely that the latter levels belong in the even-parity yrast sequence (2005Mu15). | |
| 3735.1 | (29/2-,31/2-) | E(level): π=(-) sequence. Jπ(level): Tentative π=- level sequence built on (25/2-,27/2-) 3386 level; proposed because observed proton branches with similar strength to 4994 and 4751 levels in 94Ag p decay make it unlikely that the latter levels belong in the even-parity yrast sequence (2005Mu15). | |
| 3863.2 | (29/2+) | E(level): π=(+) ΔJ=2 yrast SEQUENCE. | |
| 4138.7 | (29/2-,31/2-) | E(level): π=(-) sequence. Jπ(level): Tentative π=- level sequence built on (25/2-,27/2-) 3386 level; proposed because observed proton branches with similar strength to 4994 and 4751 levels in 94Ag p decay make it unlikely that the latter levels belong in the even-parity yrast sequence (2005Mu15). | |
| 4752.7 | (33/2-,35/2-) | E(level): π=(-) sequence. Jπ(level): Tentative π=- level sequence built on (25/2-,27/2-) 3386 level; proposed because observed proton branches with similar strength to 4994 and 4751 levels in 94Ag p decay make it unlikely that the latter levels belong in the even-parity yrast sequence (2005Mu15). | |
| 4995.6 | (33/2+) | E(level): π=(+) ΔJ=2 yrast SEQUENCE. | |
| 5649.0 | (37/2+) | E(level): π=(+) ΔJ=2 yrast SEQUENCE. | |
| 7280.8 | (41/2+) | E(level): π=(+) ΔJ=2 yrast SEQUENCE. | |
| 7662.9 | (45/2+) | E(level): π=(+) ΔJ=2 yrast SEQUENCE. |
| E(level) | E(gamma) | Comments |
| 983.5 | 983.5 | M(γ): From DCO ratio in 58Ni(40Ca,αnγ). |
| 1870.8 | 887.3 | M(γ): From DCO ratio in 58Ni(40Ca,αnγ). |
| 2232.2 | 361.5 | M(γ): From DCO ratio in 58Ni(40Ca,αnγ). |
| 2428.5 | 196.3 | I(γ): I(196γ)/I(349γ)=0.52 17 from p-γ spectra gated on 1010-keV protons in 94Ag p decay. Other data: 1.0 3 from p-γ spectra gated on 790-keV protons in 94Ag p decay; 0.18 4 from (40Ca,αnγ). M(γ): From DCO ratio in 58Ni(40Ca,αnγ). | 349.3 | M(γ): From DCO ratio in 58Ni(40Ca,αnγ). |
| 2595.5 | 516.3 | M(γ): From DCO ratio in 58Ni(40Ca,αnγ). |
| 2870.9 | 275.4 | M(γ): DCO in (40Ca,αnγ) suggests Q or D+Q but γ asymmetry in (58Ni,αnγ) is consistent with pure d. Possibly γ is a doublet, as suggested in 94Ag p decay (0.39 s). |
| 3386.0 | 514.5 | M(γ): possibly E1; connects π=(+) and π=(-) level sequences.. From DCO ratio in 58Ni(40Ca,αnγ). |
| 3735.1 | 349.0 | M(γ): (d) for doublet in 40Ca(58Ni,αnγ). |
| 3863.2 | 992.4 | E(γ): from (58Ni,αnγ). Other Eγ: 991.2 7 from (40Ca,αnγ). |
| 4138.7 | 276 | E(γ): from 94Ag p decay (0.39 s). M(γ): possibly E1; connects π=(+) and π=(-) level sequences. However, see comment on 275γ from 2871 level. | 403 | E(γ): from 94Ag p decay (0.39 s). |
| 4752.7 | 614 | E(γ): from 94Ag p decay (0.39 s). |
Production:
2000Sc31: 58Ni(40Ca,αn), E=188 MeV; enriched 58Ni target, online mass separation; Si E-ΔE telescope, plastic scin and 12 Ge detectors; measured direct and ε-delayed protons, Eγ, Iγ, γβ+ coin and γγβ+ coin; shell-model calculations.
2000WeZZ: 112Sn bombardment of Be, E(112Sn)=112 GeV; fragment mass separation, time of flight for identification; four double-sided Si strip detectors, Si β detectors, segmented-clover Ge γ detector; measured T1/2.
1994He28: Ni+106Cd, E(106Cd)=60 MeV/α; 93Pd separated and identified using projectile fragment separator with 150 ns flight path; data also reported by 1995He39 and 1995Mo26.
Others: 1995Le08 (63 MeV/α 112Sn on Ni); 1976FaZW (60Ni(40Ca,α3n), E=147 MeV).
The adopted level scheme is based on the schemes deduced in 94Ag p decay and in 58Ni(40Ca,αnγ). The scheme proposed in 40Ca(58Ni,αnγ) is less extensive, but includes all but the 516γ in the cascade to the g.s. from the 7280 level; however, it reverses the order of the 984γ-1096γ cascade and reorders the 349γ-167γ-275γ cascade.
Q-value: Note: Current evaluation has used the following Q record -12600 syst 12440 syst 3730 syst -3280 syst 2003Au03,2009AuZZ
Q-value: Q(β-), S(n), S(p), Q(α): from 2009AuZZ (cf. -12920 720 (syst.), 12270 640 (syst.), 3630 570, -2610 640 (syst.), respectively, from 2003Au03).
Q-value: ΔQ-=720, ΔS(n)=640, ΔS(p)=400, ΔQ(α)=640 (2009AuZZ).
Q-value: Q(ε-p)=7570 400 from systematics (2009AuZZ) (cf. 7420 590 from systematics (2003Au03)).
Q-value: 2008Ka30 deduce a mass excess of -59440 160 for 93Pd (cf. -59700 400 from systematics in 2003Au03) based on an interpolation of S(2p) values for n=47 isotones and they estimate S(p)=3730 160 and S(2p)=5780 160. 2009AuZZ adopt mass excess of -59440 400 and S(p)=3730 400.