Talk:Isotopes of neodymium

From WikiProjectMed
Jump to navigation Jump to search

External links modified

Hello fellow Wikipedians,

I have just modified 2 external links on Isotopes of neodymium. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.

This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}} (last update: 18 January 2022).

  • If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
  • If you found an error with any archives or the URLs themselves, you can fix them with this tool.

Cheers.—InternetArchiveBot (Report bug) 14:16, 15 April 2017 (UTC)[reply]

Problem

Hi everyone!

Look, 27.2% (142Nd) + 12.2% (143Nd) + 23.8% (144Nd) + 8.3% (145Nd) + 17.2% (146Nd) + 5.8% (148Nd) + 5.6% (150Nd) =100.10% (but not exactly 100%)

In your case the Standard atomic weight will be 144.384!

Please find and correct mistake!-Surprizi (talk) 11:34, 5 September 2021 (UTC)[reply]

I checked and only from 142Nd we can take out 0.10% to receive Standard atomic weight — 144.242. So in my opinion 142Nd percentage should be 27.1% not 27.2%.-Surprizi (talk) 11:51, 5 September 2021 (UTC)[reply]
Probably there's a rounding error in the table or the source. I will take a look later. ComplexRational (talk) 14:49, 5 September 2021 (UTC)[reply]
142Nd 60 82 141.9077233 27.1% 38.45699301
143Nd 60 83 142.9098143 12.2% 17.43499734
144Nd 60 84 143.9100873 23.8% 34.25060078
145Nd 60 85 144.9125736 8.3% 12.02774361
146Nd 60 86 145.9131169 17.2% 25.09705611
148Nd 60 88 147.9168930 5.8% 8.579179794
150Nd 60 90 149.9208910 5.6% 8.395569896
Ar, stand.(Nd) 100% 144.242141

This is my calculations with corrections from 27.2% to 27.1%.-Surprizi (talk) 18:43, 5 September 2021 (UTC)[reply]

Standard atomic weight is given in {{CIAAW2017}}[1]. In fact, this source is already present in the article. -DePiep (talk) 19:12, 5 September 2021 (UTC)[reply]
It's because 142Nd is 27.152(40)% which was rounded to 27.2%. Double sharp (talk) 14:02, 30 December 2023 (UTC)[reply]

References

  1. ^ "Standard atomic weights of 14 chemical elements revised". CIAAW. 2018-06-05.

Possible α decay of several isotopes of neodymium

According to [1], 143Nd (N = 83), 145Nd (N = 85) and 146Nd (N = 86) should respectively have an α decay half-life at the order of 1088 years, 1022 years and 1034 years. Given the trend, 147Nd (N = 87) may have an alpha decay partial half-life at the order of 1052 years. 148Nd (N = 88) should have an α decay half-life at the order of 1070 years. Note that alpha decay of 146Nd would be non-ignorable (having significant branching ratio) compared to the theoretical half-life of double beta decay at the order of either 1028 years given in [2], [3] or 1033 years given in [4].

139Nd (N = 79) and 149Nd (N = 89) have respectively an alpha decay energy of 0.21 MeV and 0.29 MeV, which is quite low, so alpha decay may be possible but with a partial half-life long beyond imagination. 129.104.241.214 (talk) 09:43, 4 November 2023 (UTC) and Cristiano Toàn (talk) 02:41, 26 January 2024 (UTC)[reply]

Retrieved from "https://mdwiki.org/wiki/Talk:Isotopes_of_neodymium"