Holmium-145

Properties and data of the isotope ¹⁴⁵Ho.

Content

General data

Name of the isotope:Holmium-145; Ho-145Symbol:¹⁴⁵Ho or 14567HoMass number A:145 (= number of nucleons)Atomic number Z:67 (= number of protons)Neutrons N:78Isotopic mass:144.947267(8) u (atomic weight of Holmium-145)Nuclide mass:144.9105153 u (calculated nuclear mass without electrons)Mass excess:-49.12047 MeVMass defect:1.252873592 u (per nucleus)Nuclear binding energy:1167.04423371 MeV (per nucleus)
8.04858092 MeV (average binding energy per nucleon)Separation energy:S_N = 12.582(11) MeV (first neutron)Half-life:2.4(1) sDecay constant λ:0.28881132523331 s^-1Specific activity α:1.207821168402 × 10⁺²¹ Bq g^-1
32643815362.238 Ci g^-1Spin and parity:
(nuclear angular momentum)(11/2-)Year of discovery:1987

Radioactive Decay

Half-life T_½ = 2.4(1) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	¹⁴⁵Dy	100 %	9.122(10) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 78) and isobaric (same nucleon number A = 145) with Holmium-145. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 78	Isobar A = 145
43	¹²¹Tc
44	¹²²Ru
45	¹²³Rh
46	¹²⁴Pd
47	¹²⁵Ag
48	¹²⁶Cd
49	¹²⁷In
50	¹²⁸Sn
51	¹²⁹Sb
52	¹³⁰Te
53	¹³¹I	¹⁴⁵I
54	¹³²Xe	¹⁴⁵Xe
55	¹³³Cs	¹⁴⁵Cs
56	¹³⁴Ba	¹⁴⁵Ba
57	¹³⁵La	¹⁴⁵La
58	¹³⁶Ce	¹⁴⁵Ce
59	¹³⁷Pr	¹⁴⁵Pr
60	¹³⁸Nd	¹⁴⁵Nd
61	¹³⁹Pm	¹⁴⁵Pm
62	¹⁴⁰Sm	¹⁴⁵Sm
63	¹⁴¹Eu	¹⁴⁵Eu
64	¹⁴²Gd	¹⁴⁵Gd
65	¹⁴³Tb	¹⁴⁵Tb
66	¹⁴⁴Dy	¹⁴⁵Dy
67	¹⁴⁵Ho	¹⁴⁵Ho
68	¹⁴⁶Er	¹⁴⁵Er
69	¹⁴⁷Tm	¹⁴⁵Tm
70	¹⁴⁸Yb
71	¹⁴⁹Lu