143m Sm
62 81
Half life: 66 s 2
Jp: 11/2-
Decay mode: IT, e+b+
Ex(keV): 754.0 2
Sn (keV): 8602 11
Sp (keV): 5731 43
E(level): 754.0 2 keV
Prod. mode: Charged particle reaction
Photon reaction
Fast neutron activation
Literature cut-off date: 1-Jan-1991
Author(s): L.K. Peker
ENSDF citation: NDS 64,429 (1991)

Decay properties

Mode Branching (%) Q-value (keV)
IT 99.76 6
e+b+ 0.24 6 3443 4

Gammas from 143mSm (66 s 2)

Eg (keV) Ig (%) Decay mode
687.7 4 0.19 e+b+
754.0 2 90 IT
959.8 2 0.039 4 e+b+

X-rays from 143mSm (66 s 2)

E (keV) I (%) Assignment
4,809 0.00031 3 Pm Ll
4,993 0.0210 21 Sm Ll
5,363 1.16E-04 9 Pm Lh
5,408 0.00082 5 Pm La2
5,432 0.0074 5 Pm La1
5,589 0.0080 6 Sm Lh
5,610 0.056 3 Sm La2
5,636 0.51 3 Sm La1
5,957 0.00042 7 Pm Lb4
5,961 0.0046 4 Pm Lb1
6,071 0.00071 11 Pm Lb3
6,128 6.7E-05 4 Pm Lb6
6,196 0.032 5 Sm Lb4
6,206 0.325 24 Sm Lb1
6,317 0.053 8 Sm Lb3
6,339 0.00157 10 Pm Lb2
6,371 0.0047 3 Sm Lb6
6,587 0.107 7 Sm Lb2
6,892 0.00075 6 Pm Lg1
7,183 0.054 4 Sm Lg1
7,186 1.30E-04 21 Pm Lg2
7,186 1.8E-04 3 Pm Lg3
7,471 0.0098 16 Sm Lg2
7,489 0.0139 22 Sm Lg3
37,756 7.3E-06 3 Pm Ka3
38,171 0.0334 10 Pm Ka2
38,725 0.0606 17 Pm Ka1
39,097 0.000529 16 Sm Ka3
39,522 2.09 4 Sm Ka2
40,118 3.78 8 Sm Ka1
43,713 0.00590 17 Pm Kb3
43,827 0.0114 3 Pm Kb1
44,145 1.64E-04 7 Pm Kb5
44,942 0.00374 11 Pm Kb2
45,064 0.00141 6 Pm Kb4
45,294 0.369 8 Sm Kb3
45,414 0.715 15 Sm Kb1
45,741 0.0106 4 Sm Kb5
46,578 0.236 5 Sm Kb2
46,705 0.089 4 Sm Kb4

Betas from 143mSm (66 s 2)

>Eb endpoint (keV) Ib (%) Decay mode
2215,2 0.00023 b+
3237,2 0.00035 e