Bra-ket notation typefaces

Question

I have been using the braket package for using the dirac bra-ket notation. I came across many old books, e.g. Dirac's Principles of quantum mechanics, which contain a different font or typeface for the bra-ket notation. I wanted to try writing a document for myself with such a typeface. I have tried the default latex font, Baskerville and a few others but was not able to find a similar bra and ket.  So my question is as follows: How can I obtain a similar looking bra and ket in latex.
For reference, an example of the bra and ket that I mention is given below:

Note

Davislor · Answer

As suggested in a comment, you can use DeclareMathDelimiter from mathtools to define bra and ket.
documentclass{article}
usepackage{mathtools}

DeclarePairedDelimiter{bra}{langle}{rvert}
DeclarePairedDelimiter{ket}{lvert}{rangle}

begin{document}
[ bra{x} ket{y} quad bra[big]{x}ket[big]{y^2}
]
end{document}

There is also a definition of braket as an example on page 28 of the mathtools manual.
DeclarePairedDelimiterXbraket[3]%
  {langle}%
  {rangle}%
  {#1,delimsizevert,mathopen{}#2,delimsizevert,mathopen{}#3}

The manual also has an example of setting three arguments within a bra, a ket and in between.
If you want to change the font used only for these delimiters, there is a standard interface for this in `unicode-math:
documentclass{article}
usepackage{mathtools}
usepackage{unicode-math}

setmathfont{NewCMMath-Book}
setmathfont{Libertinus Math}[
  Scale=MatchUppercase,
  range={langle,rangle,vert}]

DeclarePairedDelimiter{bra}{langle}{rvert}
DeclarePairedDelimiter{ket}{lvert}{rangle}

begin{document}
[ bra{x} ket{y} quad bra[big]{x}ket[big]{y^2}
]
end{document}

To redefine langlw, rangle, etc. with legacy math fonts is less standardized. It involves loading a symbol alphabet (of which you only have sixteen) and checking its font table.

Bra-ket notation typefaces

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