159 Dy
66 93
Half life: 144.4 d 2
Jp: 3/2-
Decay mode: e
Sn (keV): 6831.5 25
Sp (keV): 6985.9 13
Prod. mode: Fast neutron activation
Thermal neutron activation
Literature cut-off date: 1-Mar-1994
Author(s): R.G. Helmer
ENSDF citation: NDS 72,83 (1994)

Decay properties

Mode Branching (%) Q-value (keV)
e 100 365.6 12

Gammas from 159Dy (144.4 d 2)

Eg (keV) Ig (%) Decay mode
15.4 e
58.00 1 2.22 13 e
79.45 2 0.00048 13 e
137.5 2 0.00011 3 e
210.8 3 4E-5 2 e
226.01 4 3.6E-6 2 e
290.27 17 0.00014 5 e
305.55 14 1.08E-6 8 e
348.16 7 0.00095 10 e
363.55 4 5.5E-5 3 e

X-rays from 159Dy (144.4 d 2)

E (keV) I (%) Assignment
5,547 0.31 3 Tb Ll
6,239 0.83 6 Tb La2
6,273 7.4 5 Tb La1
6,284 0.110 9 Tb Lh
6,940 0.50 8 Tb Lb4
6,977 4.8 4 Tb Lb1
7,097 0.82 13 Tb Lb3
7,116 0.076 5 Tb Lb6
7,367 1.54 11 Tb Lb2
8,105 0.82 7 Tb Lg1
8,398 0.16 3 Tb Lg2
8,423 0.23 4 Tb Lg3
43,288 0.0092 4 Tb Ka3
43,744 27.0 9 Tb Ka2
44,482 48.5 17 Tb Ka1
50,228 4.89 17 Tb Kb3
50,384 9.5 3 Tb Kb1
50,738 0.156 8 Tb Kb5
51,698 3.14 11 Tb Kb2
51,849 1.17 6 Tb Kb4

Betas from 159Dy (144.4 d 2)

>Eb endpoint (keV) Ib (%) Decay mode
2,09 0.00019 5 e
17,42 0.0012 1 e
228,14 0.0028 6 e
307,6 26.6 14 e
365,6 73.4 14 e