Vocatives

Vocatives - calling the name of the person or persons you are talking to - stand outside the grammatical structure of a sentence. Are they accented or not? This depends partly on where they stand. A vocative at the beginning of an utterance is accented, and normally has its own IP, thus becoming nuclear:

Humphrey! | Love to see you again.
Lu⤵⤴cille, | are you going to be available?
We also accent a vocative when we want to indicate who we are talking to, perhaps when there are other people within earshot:

Hi, Peter!
Morning, | Mrs Robinson!
But usually it is already clear who we are talking to. Perhaps we are looking at them, holding eye contact with them. Perhaps there is no one else present. Then a final vocative is usually not accented but attached to the preceding IP as (part of) the tail:

Are you going to be available, Lucille?
Hi, Peter!
Morning, Mrs Robinson.
Yes, dear. | I'll do it right away, dear.
Here's my essay, Dr Smith.
Even if a final vocative appears to include new information directed towards the known addressee, it remains unaccented. (Or it may be uttered as a separate IP in low key; see
5.16
)

I 'love you, my little dimpled one.
You've 'missed it, you fool.
'Stop, you blithering idiot!