Ytterbium-151m2

Properties and data of the isotope ^151m2Yb.

Contents

General data

Name of the isotope:Ytterbium-151m2; Yb-151m2Symbol:^151m2Yb or 151m270YbMass number A:151 (= number of nucleons)Atomic number Z:70 (= number of protons)Neutrons N:81Isotopic mass:150.95540(32) u (atomic weight of Ytterbium-151m2)
Excitation energy: +y kevNuclide mass:150.9170029 u (calculated nuclear mass without electrons)Mass excess:-41.54463 MeVMass defect:1.294210436 u (per nucleus)Nuclear binding energy:1205.54925587 MeV (per nucleus)
7.98376991 MeV (average binding energy per nucleon)Half-life:2.6(7) μsDecay constant λ:266595.06944613 s^-1Specific activity α:1.070315373846 × 10⁺²⁷ Bq g^-1
2.892744253638 × 10⁺¹⁶ Ci g^-1Spin and parity:
(nuclear angular momentum)

Radioactive Decay

Half-life T_½ = 2.6(7) μs respectively 2.6 × 10^-6 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
Iso	¹⁵¹Yb	ca. 100 %

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
¹⁵¹Yb		1.6(1) s	(1/2+)
^151m1Yb	+x keV	1.6(1) s	(11/2-)
^151m3Yb	+z keV	20(1) μs	(27/2-)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 81) and isobaric (same nucleon number A = 151) with Ytterbium-151m2. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 81	Isobar A = 151
45	¹²⁶Rh
46	¹²⁷Pd
47	¹²⁸Ag
48	¹²⁹Cd
49	¹³⁰In
50	¹³¹Sn
51	¹³²Sb
52	¹³³Te
53	¹³⁴I
54	¹³⁵Xe
55	¹³⁶Cs	¹⁵¹Cs
56	¹³⁷Ba	¹⁵¹Ba
57	¹³⁸La	¹⁵¹La
58	¹³⁹Ce	¹⁵¹Ce
59	¹⁴⁰Pr	¹⁵¹Pr
60	¹⁴¹Nd	¹⁵¹Nd
61	¹⁴²Pm	¹⁵¹Pm
62	¹⁴³Sm	¹⁵¹Sm
63	¹⁴⁴Eu	¹⁵¹Eu
64	¹⁴⁵Gd	¹⁵¹Gd
65	¹⁴⁶Tb	¹⁵¹Tb
66	¹⁴⁷Dy	¹⁵¹Dy
67	¹⁴⁸Ho	¹⁵¹Ho
68	¹⁴⁹Er	¹⁵¹Er
69	¹⁵⁰Tm	¹⁵¹Tm
70	¹⁵¹Yb	¹⁵¹Yb
71	¹⁵²Lu	¹⁵¹Lu
72	¹⁵³Hf