Ytterbium-151m1

Properties and data of the isotope ^151m1Yb.

Contents

General data

Name of the isotope:Ytterbium-151m1; Yb-151m1Symbol:^151m1Yb or 151m170YbMass 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-151m1)
Excitation energy: +x 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:1.6(1) sDecay constant λ:0.43321698784997 s^-1Specific activity α:1.739262482 × 10⁺²¹ Bq g^-1
47007094121.622 Ci g^-1Spin and parity:
(nuclear angular momentum)(11/2-)

Radioactive Decay

Half-life T_½ = 1.6(1) s.

Decay mode	Daughter	Probability
EC/β⁺	¹⁵¹Tm	< 100 %
EC, p	¹⁵⁰Er	?
Iso	¹⁵¹Yb	ca. 0.4 %

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+)
^151m2Yb	+y kev	2.6(7) μs
^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-151m1. 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