Talk:Neutron number

Is there such a thing as Neutron number? I have never heard of such a phrase and apart from a reference to this article neither has google. The only external reference is dead (404). Atomic mass and Atomic number = proton number are well defined but are there any external references to "Neutron number"?

"The case of 84 is special"[edit]

I would say that 86 is equally special, as shown by the isodiaphers ¹⁴²Ce-¹⁴⁶Nd, ¹⁴⁴Nd-¹⁴⁸Sm and ¹⁴⁶Sm-¹⁵⁰Gd. The only difference is that ¹⁵⁰Gd is not stable to double beta decay, but it is still stable to quadruple beta decay (in contrast to ¹⁵⁰Nd). — Preceding unsigned comment added by 2A04:CEC0:108E:A0A3:2803:9251:F360:D117 (talk) 19:45, 12 February 2024 (UTC)[reply]

Magic number effect is terribly significant[edit]

Beta-stable isotones with 84 ≤ N ≤ 86 (¹⁵⁰Gd, ¹⁴⁶Sm, ¹⁴⁷Sm, ¹⁴⁴Nd, ¹⁴⁸Sm, ¹⁴⁵Nd, ¹⁴²Ce, ¹⁴⁶Nd) have short (alpha) half-lives among nuclides with 83 ≤ N ≤ 126.

Beta-stable isotones with 127 ≤ N ≤ 132 (²¹⁴Rn, ²¹²Po, ²¹³Po, ²¹⁸Ra, ²¹⁶Rn, ²¹⁵At, ²¹⁴Po, ²¹⁷Rn, ²²⁰Ra, ²¹⁹Fr, ²¹⁸Rn, ²¹⁶Po, ²¹¹Po) all have (alpha) half-lives under a second.

Beta-stable isotones with 133 ≤ N ≤ 134 (²²⁴Th, ²²¹Ra, ²²²Ra, ²²⁰Rn) have (alpha) half-lives ranging from a second to a minute.

Beta-stable isotones with 135 ≤ N ≤ 137 (²²⁶Th, ²²⁴Ra, ²²⁵Ac, ²²³Ra, ²²⁷Th) have (alpha) half-lives ranging from half an hour to several days.

Beta-stable isotones with 138 ≤ N ≤ 153 (²⁵²Fm, ²³⁰U, ²⁴²Cm, ²⁴⁸Cf, ²²⁸Th, ²³⁶Pu, ²⁵⁰Cf, ²⁴⁴Cm, ²³²U, ²³⁸Pu, ...) have (alpha) half-lives ranging from a day to billions of years.

Beta-stable isotones with 154 ≤ N ≤ 158 (²⁵⁴Fm, ²⁵⁵Fm, ²⁵⁶Fm, ²⁵⁹Md, ²⁵³Es, ²⁵⁷Fm, ²⁵²Cf, ²⁵⁴Cf; only SF known for ²⁵⁸No, ²⁵⁶Cf, ²⁵⁸Fm and ²⁶⁰No) have alpha half-lives ranging from several hours to several years. 129.104.241.214 (talk) 08:37, 28 January 2024 (UTC)[reply]

Beta-stable nuclides with odd neutron number[edit]

N	Nuclides	N	Nuclides	N	Nuclides	N	Nuclides	N	Nuclides	N	Nuclides	N	Nuclides	N	Nuclides
1	²H, ³He	21	-	41	⁷³Ge	61	-	81	¹³⁷Ba	101	¹⁷¹Yb	121	²⁰¹Hg	141	²³³U (α)
3	⁵He (n), ⁶Li	23	⁴³Ca	43	⁷⁷Sr	63	¹¹¹Cd	83	¹⁴³Nd	103	¹⁷³Yb	123	-	143	²³⁵U (α)
5	⁹Be, ¹⁰B	25	⁴⁷Ti	45	-	65	¹¹⁵Sn	85	¹⁴⁵Nd, ¹⁴⁷Sm (α)	105	¹⁷⁷Hf	125	²⁰⁷Pb	145	²³⁹Pu (α)
7	¹³C, ¹⁴N	27	⁴⁹Ti	47	⁸³Kr	67	¹¹⁷Sn	87	¹⁴⁹Sm	107	¹⁷⁹Hf	127	²¹¹Po (α)	147	-
9	¹⁷O	29	⁵³Cr	49	⁸⁷Sr	69	¹¹⁹Sn	89	-	109	¹⁸³W	129	²¹³Po (α)	149	²⁴⁵Cm (α)
11	²¹Ne	31	⁵⁷Fe	51	⁹¹Zr	71	-	91	¹⁵⁵Gd	111	¹⁸⁷Os	131	²¹⁷Rn (α)	151	²⁴⁹Cf (α)
13	²⁵Mg	33	⁶¹Ni	53	⁹⁵Mo	73	¹²⁵Te	93	¹⁵⁷Gd	113	¹⁸⁹Os	133	²²¹Ra (α)	153	²⁵¹Cf (α)
15	²⁹Si	35	-	55	⁹⁷Mo, ⁹⁹Ru	75	¹²⁹Xe	95	¹⁶¹Dy	115	-	135	²²³Ra (α)	155	²⁵⁵Fm (α)
17	³³S	37	⁶⁷Zn	57	¹⁰¹Ru	77	¹³¹Xe	97	¹⁶³Dy	117	¹⁹⁵Pt	137	²²⁷Th (α)	157	²⁵⁷Fm (α)
19	-	39	-	59	¹⁰⁵Pd	79	¹³⁵Ba	99	¹⁶⁷Er	119	¹⁹⁹Hg	139	²²⁹Th (α)

129.104.241.218 (talk) 11:18, 8 April 2024 (UTC)[reply]