Barium-134

Properties and data of the isotope ¹³⁴Ba.

Contents

See also: List of individual Barium isotopes (and general data sources).

General data

Name of the isotope:Barium-134; Ba-134Symbol:¹³⁴Ba or 13456BaMass number A:134 (= number of nucleons)Atomic number Z:56 (= number of protons)Neutrons N:78Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.3928571428571 (= neutron-proton ratio)Neutron excess (N-Z):22Isotopic mass:133.904508(2) u (atomic weight of Barium-134)Nuclide mass:133.8737896 u (calculated nuclear mass without electrons)Mass excess:-88.95023 MeVMass defect:1.20955724 u (per nucleus)Nuclear binding energy:1126.69531172 MeV (per nucleus)
8.40817397 MeV (average binding energy per nucleon)Separation energy:S_N = 9.4676(10) MeV (first neutron)
S_P = 8.1679(3) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:4.8322(47) femtometer fmYear of discovery:1936

Parent Nuclides

Direct parent isotopes are: ¹³⁴La, ¹³⁴Cs, ¹³⁴Xe.

Occurrence

Comparison of the natural Barium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

	Atomic Mass m_a	Quantity	Half-life	Spin
Barium Isotopic mixture	137.327 u	100 %
Isotope ¹³⁰Ba	129.90632(2) u	0.11(1) %	1.6 × 10²¹ a	0+
Isotope ¹³²Ba	131.9050611(11) u	0.10(1) %	stable	0+
Isotope ¹³⁴Ba	133.904508(2) u	2.42(15) %	stable	0+
Isotope ¹³⁵Ba	134.905688(2) u	6.59(10) %	stable	3/2+
Isotope ¹³⁶Ba	135.904576(2) u	7.85(24) %	stable	0+
Isotope ¹³⁷Ba	136.905827(2) u	11.23(23) %	stable	3/2+
Isotope ¹³⁸Ba	137.905247(2) u	71.70(29) %	stable	0+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 78) and isobaric (same nucleon number A = 134) with Barium-134. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

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