Master Isotope Table + γ & Kα (Batch 5: Z

Z	Elem	Known	Stable	Unstable	Pred.	Gap	Nuclear γ (keV)	f(γ) (Hz)	Kα₁ (keV)	f(Kα₁) (Hz)	Context
81	Tl	39	2	37	93	54	2614.5	6.32×10^20	72.871	1.76×10^19	²⁰⁸Tl (Th chain) + XRF
82	Pb	43	4	39	102	59	351.9 / 46.5	8.51×10^19 / 1.12×10^19	74.969	1.81×10^19	²¹⁴Pb, ²¹⁰Pb; XRF
83	Bi	41	0	41	97	56	609.3 / 1120.3 / 1764.5	1.47×10^20 / 2.71×10^20 / 4.27×10^20	77.107	1.86×10^19	²¹⁴Bi γs + XRF
84	Po	42	0	42	100	58	—	—	79.292	1.92×10^19	α-emitter, no strong γ; XRF
85	At	39	0	39	93	54	—	—	81.58	1.97×10^19	Short-lived α; XRF theor.
86	Rn	39	0	39	93	54	609.3 / 1764.5	1.47×10^20 / 4.27×10^20	83.9	2.03×10^19	γs via daughters; noble gas
87	Fr	34	0	34	81	47	—	—	86.3	2.09×10^19	Short-lived; XRF theor.
88	Ra	34	0	34	81	47	186.2	4.50×10^19	88.8	2.15×10^19	²²⁶Ra tracer + XRF
89	Ac	33	0	33	78	45	911.2	2.20×10^20	91.4	2.21×10^19	²²⁸Ac fission chain + XRF
90	Th	31	1	30	74	43	238.6 / 2614.5	5.76×10^19 / 6.32×10^20	94.0	2.27×10^19	Th-series γs + XRF
91	Pa	29	0	29	69	40	312.0	7.53×10^19	96.7	2.34×10^19	²³³Pa intermediate + XRF
92	U	28	0	28	66	38	1001.0	2.42×10^20	98.439	2.38×10^19	²³⁴mPa (U-series) + XRF
93	Np	20	0	20	47	27	106.1	2.56×10^19	(theor.)	—	²³⁷Np γ; Kα theor.
94	Pu	20	0	20	47	27	375.0 / 51.6	9.07×10^19 / 1.25×10^19	(theor.)	—	²³⁹Pu (fuel); Kα theor.
95	Am	17	0	17	40	23	59.5	1.44×10^19	(theor.)	—	²⁴¹Am detectors; Kα theor.
96	Cm	19	0	19	45	26	333.0	8.05×10^19	(theor.)	—	Cm isotopes; Kα theor.
97	Bk	21	0	21	50	29	225.0	5.43×10^19	(theor.)	—	²⁴⁹Bk research; Kα theor.
98	Cf	20	0	20	47	27	388.0	9.45×10^19	(theor.)	—	²⁵²Cf neutron source; Kα theor.
99	Es	18	0	18	43	25	300.0	7.25×10^19	(theor.)	—	²⁵³Es research; Kα theor.
100	Fm	19	0	19	45	26	125.0	3.02×10^19	(theor.)	—	²⁵⁵Fm lab-only; Kα theor.

Master Isotope Table + γ & Kα (Batch 6: Z = 101–118)

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