List of levels for 169HO

ADOPTED LEVELS, GAMMAS for ¹⁶⁹Ho

Author: M. Shamsuzzoha Basunia | Citation: Nucl. Data Sheets 209, 1 (2026) | Cutoff date: 1-Oct-2025

Full ENSDF file | Adopted Levels (PDF version)

Q(β-)=2125 keV 20	S(n)= 6810 keV 40	S(p)= 7.53×10³ keV 14	Q(α)= -632 keV 20
Reference: 2021WA16

References:
A	¹⁶⁹Dy β^- decay	B	¹⁷⁰Er(d,³He)
C	¹⁷⁰Er(pol t,α)	D	¹⁷⁰Er(¹³⁶Xe,xγ)

Mass excess: -58820.7 keV 47 (2024Ja12) cf. -58796 keV 20 (2021Wa16)

Q-value: S(2n)=12659 21, S(2p)=17491 20 (2021Wa16)

E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
0.0	A B C D	7/2-	4.7 m 1 % β^- = 100
97.5 2	B C D	9/2-		97.7	100		0.0	7/2-
216.9 2	B C D	11/2-		119.2 216.7	100 21.9 24		97.5 0.0	9/2- 7/2-
254 4	B C	3/2+
315 4	B C	5/2+
357.6 3	D	13/2-		140.4 260.4	100 31.0 29		216.9 97.5	11/2- 9/2-
359 4	B C	3/2+
382 4	B C	7/2+
460 4	B C	9/2+
493 4	B C	7/2+
518.7 3	D	15/2-		161.1 301.7	100 42.6 37		357.6 216.9	13/2- 11/2-
520 4	B C	(7/2+,9/2+)
701.1 4	D	17/2-		182.5 343.6	100 61.3 36		518.7 357.6	15/2- 13/2-
722 4	C
775 4	B C	(5/2-)
860 10	B	(9/2-)
902.8 4	D	19/2-		201.7 384.0			701.1 518.7	17/2- 15/2-
1017 4	C	(5/2+)
1069 15	B	(1/2+)
1079 4	C	7/2+
1137 15	B
1179 4	B C	7/2+
1277 4	B C	9/2+
1343 15	B
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
1365 4	B C	7/2-
1386.4 4	D	(19/2+)	118 µs 6	483.6 685.4 867.3?	23.7 17 100.0 43 ≤2.1	[E1] [E1] [M2]	902.8 701.1 518.7	19/2- 17/2- 15/2-
1420 4	B C	(3/2+,5/2+)
1536 4	B C	11/2-
1578.2 4	A	(3/2,5/2,7/2)-		1578.2 4	100	[M1,E2]	0.0	7/2-
1618 15	B
1651 4	C	(11/2-)
1692 5	B C	5/2+
1745 4	C	(1/2+)
1786 4	B C	1/2+
1850 4	C	5/2+
1864 5	B C	(11/2-)

E(level): From a least-squares fit to Eγ’s, assuming 0.3 keV uncertainty for γ rays without uncertainties. Excited level energies without depopulating gammas are from ¹⁷⁰Er(pol t,α), except when seen only in ¹⁷⁰Er(d,³He) or where noted otherwise.

J^π(level): From angular distributions and analyzing powers in ¹⁷⁰Er(pol t,α), except where noted.

E(γ): From (¹³⁶Xe,xγ), except where otherwise noted.

I(γ): Relative photon branching from β^- decay.

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 1 - 7/2[523] band. Band parameter: α=10.7.
0.0	7/2-	4.7 m 1 % β^- = 100
97.5 2	9/2-		97.7	100		0.0	7/2-
216.9 2	11/2-		119.2 216.7	100 21.9 24		97.5 0.0	9/2- 7/2-
357.6 3	13/2-
518.7 3	15/2-
701.1 4	17/2-		182.5 343.6	100 61.3 36		518.7 357.6	15/2- 13/2-
902.8 4	19/2-
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 2 - 3/2[411] band. Band parameters: α=12.1, B=-100 (3/2, 5/2, 7/2,
254 4	3/2+
315 4	5/2+
382 4	7/2+
460 4	9/2+
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 3 - 1/2[411] band.
359 4	3/2+
493 4	7/2+
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 4 - 7/2[404] band.
1079 4	7/2+
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 5 - 5/2[413] band. Band parameter: α=10.9.
1179 4	7/2+
1277 4	9/2+
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 6 - 5/2[532] band. Band parameter: α=8.5.
1365 4	7/2-
1536 4	11/2-
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 7 - 1/2[420] band.
1786 4	1/2+
1850 4	5/2+
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 8 - 5/2[402]? band.
1692 5	5/2+
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 9 - Tentative 1/2[541] band.
775 4	(5/2-)
860 10	(9/2-)

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ) (keV)	Multipolarity	Conversion Coefficient	Additional Data
1386.4	(19/2+)	118 µs 6	483.6	[E1]	0.00577	B(E1)(W.u.)=3.14E-12 +28-26, α=0.00577 8, α(K)=0.00490 7, α(L)=0.000681 10, α(M)=0.0001490 21, α(N)=3.44E-5 5, α(O)=4.93E-6 7, α(P)=2.64E-7 4
	(19/2+)	118 µs 6	685.4	[E1]	0.00273	B(E1)(W.u.)=4.65E-12 +27-24, α=0.00273 4, α(K)=0.002327 33, α(L)=0.000317 4, α(M)=6.93E-5 10, α(N)=1.603E-5 22, α(O)=2.313E-6 32, α(P)=1.274E-7 18
	(19/2+)	118 µs 6	867.3	[M2]	0.02101	α=0.02101 29, α(K)=0.01756 25, α(L)=0.00269 4, α(M)=0.000599 8, α(N)=0.0001392 19, α(O)=2.025×10^-5 28, α(P)=1.132E-6 16
1578.2	(3/2,5/2,7/2)-		1578.2 4	[M1,E2]	0.00173	α=0.00173 32, α(K)=0.00137 27, α(L)=0.00019 4, α(M)=4.2×10^-5 8, α(N)=9.7E-6 18, α(O)=1.41E-6 27, α(P)=8.1E-8 17

E(level)	J^π(level)	T_1/2(level)	Comments
0.0	7/2-	4.7 m 1 % β^- = 100	E(level): 7/2[523] band. Band parameter: α=10.7.
97.5	9/2-		E(level): 7/2[523] band. Band parameter: α=10.7.
216.9	11/2-		E(level): 7/2[523] band. Band parameter: α=10.7.
254	3/2+		E(level): 3/2[411] band. Band parameters: α=12.1, B=-100 (3/2, 5/2, 7/2,.
315	5/2+		E(level): 3/2[411] band. Band parameters: α=12.1, B=-100 (3/2, 5/2, 7/2,.
357.6	13/2-		E(level): 7/2[523] band. Band parameter: α=10.7.
359	3/2+		E(level): 1/2[411] band.
382	7/2+		E(level): 3/2[411] band. Band parameters: α=12.1, B=-100 (3/2, 5/2, 7/2,.
460	9/2+		E(level): 3/2[411] band. Band parameters: α=12.1, B=-100 (3/2, 5/2, 7/2,.
493	7/2+		E(level): 1/2[411] band.
518.7	15/2-		E(level): 7/2[523] band. Band parameter: α=10.7.
701.1	17/2-		E(level): 7/2[523] band. Band parameter: α=10.7.
775	(5/2-)		E(level): Tentative 1/2[541] band.
860	(9/2-)		E(level): Tentative 1/2[541] band.
902.8	19/2-		E(level): 7/2[523] band. Band parameter: α=10.7.
1079	7/2+		E(level): 7/2[404] band.
1179	7/2+		E(level): 5/2[413] band. Band parameter: α=10.9.
1277	9/2+		E(level): 5/2[413] band. Band parameter: α=10.9.
1365	7/2-		E(level): 5/2[532] band. Band parameter: α=8.5.
1386.4	(19/2+)	118 µs 6	Proposed configuration: π7/2[523]~#ν5/2[512]~#ν7/2[633].
1536	11/2-		XREF: B(1524). E(level): 5/2[532] band. Band parameter: α=8.5.
1692	5/2+		E(level): 5/2[402]? band.
1786	1/2+		XREF: B(1768). E(level): 1/2[420] band.
1850	5/2+		E(level): 1/2[420] band.